diff --git a/src/main/java/seedu/address/logic/commands/EditCommand.java b/src/main/java/seedu/address/logic/commands/EditCommand.java
index ffe3aa5b603..f572e99c0f9 100644
--- a/src/main/java/seedu/address/logic/commands/EditCommand.java
+++ b/src/main/java/seedu/address/logic/commands/EditCommand.java
@@ -30,6 +30,7 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.preferredtime.PreferredTime;
 import seedu.address.model.tag.Tag;
 
 /**
@@ -106,8 +107,11 @@ private static Person createEditedPerson(Person personToEdit, EditPersonDescript
         Address updatedAddress = editPersonDescriptor.getAddress().orElse(personToEdit.getAddress());
         Set<Tag> updatedTags = editPersonDescriptor.getTags().orElse(personToEdit.getTags());
         Map<String, Game> updatedGames = editPersonDescriptor.getGames().orElse(personToEdit.getGames());
+        Set<PreferredTime> updatedPreferredTimes =
+                editPersonDescriptor.getPreferredTimes().orElse(personToEdit.getPreferredTimes());
 
-        return new Person(updatedName, updatedPhone, updatedEmail, updatedAddress, updatedTags, updatedGames);
+        return new Person(updatedName, updatedPhone, updatedEmail, updatedAddress, updatedTags,
+                updatedGames, updatedPreferredTimes);
     }
 
     @Override
@@ -145,6 +149,7 @@ public static class EditPersonDescriptor {
         private Address address;
         private Set<Tag> tags;
         private Map<String, Game> games;
+        private Set<PreferredTime> preferredTimes;
 
 
         public EditPersonDescriptor() {}
@@ -160,6 +165,7 @@ public EditPersonDescriptor(EditPersonDescriptor toCopy) {
             setAddress(toCopy.address);
             setTags(toCopy.tags);
             setGames(toCopy.games);
+            setPreferredTimes(toCopy.preferredTimes);
         }
 
         /**
@@ -234,6 +240,26 @@ public void setGames(Map<String, Game> games) {
         public Optional<Map<String, Game>> getGames() {
             return (games != null) ? Optional.of(Collections.unmodifiableMap(games)) : Optional.empty();
         }
+
+        /**
+         * Sets {@code preferredTimes} to this object's {@code preferredTimes}.
+         * A defensive copy of {@code preferredTimes} is used internally.
+         */
+        public void setPreferredTimes(Set<PreferredTime> preferredTimes) {
+            this.preferredTimes = (preferredTimes != null) ? new HashSet<>(preferredTimes) : null;
+        }
+
+        /**
+         * Returns an unmodifiable preferredTime set, which throws {@code UnsupportedOperationException}
+         * if modification is attempted.
+         * Returns {@code Optional#empty()} if {@code preferredTimes} is null.
+         */
+        public Optional<Set<PreferredTime>> getPreferredTimes() {
+            return (preferredTimes != null)
+                    ? Optional.of(Collections.unmodifiableSet(preferredTimes))
+                    : Optional.empty();
+        }
+
         @Override
         public boolean equals(Object other) {
             if (other == this) {
diff --git a/src/main/java/seedu/address/logic/parser/AddCommandParser.java b/src/main/java/seedu/address/logic/parser/AddCommandParser.java
index 0fc878c27b6..00b78379874 100644
--- a/src/main/java/seedu/address/logic/parser/AddCommandParser.java
+++ b/src/main/java/seedu/address/logic/parser/AddCommandParser.java
@@ -6,6 +6,7 @@
 import static seedu.address.logic.parser.CliSyntax.PREFIX_GAME;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_NAME;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_PHONE;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_PREFERREDTIME;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_TAG;
 
 import java.util.Map;
@@ -20,6 +21,7 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.preferredtime.PreferredTime;
 import seedu.address.model.tag.Tag;
 
 /**
@@ -35,7 +37,7 @@ public class AddCommandParser implements Parser<AddCommand> {
     public AddCommand parse(String args) throws ParseException {
         ArgumentMultimap argMultimap =
                 ArgumentTokenizer.tokenize(args, PREFIX_NAME, PREFIX_PHONE, PREFIX_EMAIL, PREFIX_ADDRESS, PREFIX_TAG,
-                        PREFIX_GAME);
+                        PREFIX_GAME, PREFIX_PREFERREDTIME);
 
         if (!arePrefixesPresent(argMultimap, PREFIX_NAME, PREFIX_ADDRESS, PREFIX_PHONE, PREFIX_EMAIL)
                 || !argMultimap.getPreamble().isEmpty()) {
@@ -49,11 +51,10 @@ public AddCommand parse(String args) throws ParseException {
         Address address = ParserUtil.parseAddress(argMultimap.getValue(PREFIX_ADDRESS).get());
         Set<Tag> tagList = ParserUtil.parseTags(argMultimap.getAllValues(PREFIX_TAG));
         Map<String, Game> gameList = ParserUtil.parseGames(argMultimap.getAllValues(PREFIX_GAME));
+        Set<PreferredTime> preferredTimeList =
+                ParserUtil.parsePreferredTimes(argMultimap.getAllValues(PREFIX_PREFERREDTIME));
 
-        // TODO: use get a Set<PreferredTime> with the help of ParserUtil
-        // TODO: update the Person construction
-
-        Person person = new Person(name, phone, email, address, tagList, gameList);
+        Person person = new Person(name, phone, email, address, tagList, gameList, preferredTimeList);
 
         return new AddCommand(person);
     }
diff --git a/src/main/java/seedu/address/logic/parser/ParserUtil.java b/src/main/java/seedu/address/logic/parser/ParserUtil.java
index cceaa0db58e..a5c0ba29d91 100644
--- a/src/main/java/seedu/address/logic/parser/ParserUtil.java
+++ b/src/main/java/seedu/address/logic/parser/ParserUtil.java
@@ -19,6 +19,7 @@
 import seedu.address.model.person.Email;
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Phone;
+import seedu.address.model.preferredtime.PreferredTime;
 import seedu.address.model.tag.Tag;
 
 /**
@@ -202,6 +203,31 @@ public static Map<String, Game> parseGames(Collection<String> games) throws Pars
     }
 
 
-    // TODO: parsePreferredTime and parsePreferredTimes
+    /**
+     * Parses a {@code String preferredTime} into a {@code PreferredTime}.
+     * Leading and trailing whitespaces will be trimmed.
+     *
+     * @throws ParseException if the given {@code preferredTime} is invalid.
+     */
+    public static PreferredTime parsePreferredTime(String preferredTime) throws ParseException {
+        requireNonNull(preferredTime);
+        String trimmedPreferredTime = preferredTime.trim();
+        if (!PreferredTime.isValidPreferredTime(trimmedPreferredTime)) {
+            throw new ParseException(PreferredTime.MESSAGE_CONSTRAINTS);
+        }
+        return new PreferredTime(trimmedPreferredTime);
+    }
+
+    /**
+     * Parses {@code Collection<String> preferredTimes} into a {@code Set<PreferredTime>}.
+     */
+    public static Set<PreferredTime> parsePreferredTimes(Collection<String> preferredTimes) throws ParseException {
+        requireNonNull(preferredTimes);
+        final Set<PreferredTime> preferredTimeSet = new HashSet<>();
+        for (String preferredTime : preferredTimes) {
+            preferredTimeSet.add(parsePreferredTime(preferredTime));
+        }
+        return preferredTimeSet;
+    }
 
 }
diff --git a/src/main/java/seedu/address/model/person/Person.java b/src/main/java/seedu/address/model/person/Person.java
index 69eaf801c66..cfbaea03cbf 100644
--- a/src/main/java/seedu/address/model/person/Person.java
+++ b/src/main/java/seedu/address/model/person/Person.java
@@ -11,6 +11,7 @@
 
 import seedu.address.commons.util.ToStringBuilder;
 import seedu.address.model.game.Game;
+import seedu.address.model.preferredtime.PreferredTime;
 import seedu.address.model.tag.Tag;
 
 /**
@@ -28,21 +29,21 @@ public class Person {
     private final Address address;
     private final Set<Tag> tags = new HashSet<>();
     private final Map<String, Game> games = new TreeMap<>(String.CASE_INSENSITIVE_ORDER);
-
-    // TODO: update the preferredTime field
-    // TODO: update the constructors and some other method
+    private final Set<PreferredTime> preferredTimes = new HashSet<>();
 
     /**
      * Every field must be present and not null.
      */
-    public Person(Name name, Phone phone, Email email, Address address, Set<Tag> tags, Map<String, Game> games) {
-        requireAllNonNull(name, phone, email, address, tags, games);
+    public Person(Name name, Phone phone, Email email, Address address, Set<Tag> tags,
+                  Map<String, Game> games, Set<PreferredTime> preferredTimes) {
+        requireAllNonNull(name, phone, email, address, tags, games, preferredTimes);
         this.name = name;
         this.phone = phone;
         this.email = email;
         this.address = address;
         this.tags.addAll(tags);
         this.games.putAll(games);
+        this.preferredTimes.addAll(preferredTimes);
     }
 
     public Name getName() {
@@ -76,6 +77,15 @@ public Set<Tag> getTags() {
     public Map<String, Game> getGames() {
         return games;
     }
+
+    /**
+     * Returns an immutable tag set, which throws {@code UnsupportedOperationException}
+     * if modification is attempted.
+     */
+    public Set<PreferredTime> getPreferredTimes() {
+        return Collections.unmodifiableSet(preferredTimes);
+    }
+
     /**
      * Returns true if both persons have the same name.
      * This defines a weaker notion of equality between two persons.
@@ -110,14 +120,15 @@ public boolean equals(Object other) {
                 && email.equals(otherPerson.email)
                 && address.equals(otherPerson.address)
                 && tags.equals(otherPerson.tags)
-                && games.equals(otherPerson.games);
+                && games.equals(otherPerson.games)
+                && preferredTimes.equals(otherPerson.preferredTimes);
 
     }
 
     @Override
     public int hashCode() {
         // use this method for custom fields hashing instead of implementing your own
-        return Objects.hash(name, phone, email, address, tags, games);
+        return Objects.hash(name, phone, email, address, tags, games, preferredTimes);
     }
 
     @Override
@@ -129,6 +140,7 @@ public String toString() {
                 .add("address", address)
                 .add("tags", tags)
                 .add("games", games)
+                .add("preferred times", preferredTimes)
                 .toString();
     }
 
diff --git a/src/main/java/seedu/address/model/preferredtime/PreferredTime.java b/src/main/java/seedu/address/model/preferredtime/PreferredTime.java
index 44f7a8782f9..b2773f25bac 100644
--- a/src/main/java/seedu/address/model/preferredtime/PreferredTime.java
+++ b/src/main/java/seedu/address/model/preferredtime/PreferredTime.java
@@ -17,14 +17,13 @@ public class PreferredTime {
             "PreferredTime should consists of Day and Time in the format 'Day HHmm'.\n"
             + "There should be exactly one space in between";
     public static final String VALIDATION_REGEX = "(\\p{L}+)\\s(\\d{4})$";
-    private static final Pattern VALIDATED_PATTERN = Pattern.compile(VALIDATION_REGEX);
+    public static final Pattern VALIDATED_PATTERN = Pattern.compile(VALIDATION_REGEX);
 
     public final String preferredTime;
     public final Day day;
     public final Time time;
 
 
-    // TODO: constructor
     /**
      * Constructs a {@code PreferredTime}.
      *
diff --git a/src/main/java/seedu/address/model/util/SampleDataUtil.java b/src/main/java/seedu/address/model/util/SampleDataUtil.java
index 7f479b1d3b1..9618457501a 100644
--- a/src/main/java/seedu/address/model/util/SampleDataUtil.java
+++ b/src/main/java/seedu/address/model/util/SampleDataUtil.java
@@ -17,6 +17,7 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.preferredtime.PreferredTime;
 import seedu.address.model.tag.Tag;
 
 
@@ -32,23 +33,28 @@ public static Person[] getSamplePersons() {
         return new Person[] {
             new Person(new Name("Alex Yeoh"), new Phone("87438807"), new Email("alexyeoh@example.com"),
                 new Address("Blk 30 Geylang Street 29, #06-40"),
-                getTagSet("friends"),
-                    sample),
+                getTagSet("friends"), sample,
+                getPreferredTimeSet("Monday 2100")),
             new Person(new Name("Bernice Yu"), new Phone("99272758"), new Email("berniceyu@example.com"),
                 new Address("Blk 30 Lorong 3 Serangoon Gardens, #07-18"),
-                getTagSet("colleagues", "friends"), getGameMap("LoL")),
+                getTagSet("colleagues", "friends"), getGameMap("LoL"),
+                getPreferredTimeSet("Monday 2030")),
             new Person(new Name("Charlotte Oliveiro"), new Phone("93210283"), new Email("charlotte@example.com"),
                 new Address("Blk 11 Ang Mo Kio Street 74, #11-04"),
-                getTagSet("neighbours"), getGameMap("LoL")),
+                getTagSet("neighbours"), getGameMap("LoL"),
+                getPreferredTimeSet("Saturday 1900")),
             new Person(new Name("David Li"), new Phone("91031282"), new Email("lidavid@example.com"),
                 new Address("Blk 436 Serangoon Gardens Street 26, #16-43"),
-                getTagSet("family"), getGameMap("LoL")),
+                getTagSet("family"), getGameMap("LoL"),
+                getPreferredTimeSet("Tuesday 2100", "Thursday 1900")),
             new Person(new Name("Irfan Ibrahim"), new Phone("92492021"), new Email("irfan@example.com"),
                 new Address("Blk 47 Tampines Street 20, #17-35"),
-                getTagSet("classmates"), getGameMap("LoL")),
+                getTagSet("classmates"), getGameMap("LoL"),
+                getPreferredTimeSet("Sunday 1800")),
             new Person(new Name("Roy Balakrishnan"), new Phone("92624417"), new Email("royb@example.com"),
                 new Address("Blk 45 Aljunied Street 85, #11-31"),
-                getTagSet("colleagues"), getGameMap("LoL"))
+                getTagSet("colleagues"), getGameMap("LoL"),
+                getPreferredTimeSet("Friday 2100"))
         };
     }
 
@@ -80,4 +86,13 @@ public static Map<String, Game> getGameMap(String... strings) {
         return gameMap;
     }
 
+    /**
+     * Returns a preferredTime set containing the list of strings given.
+     */
+    public static Set<PreferredTime> getPreferredTimeSet(String... strings) {
+        return Arrays.stream(strings)
+                .map(PreferredTime::new)
+                .collect(Collectors.toSet());
+    }
+
 }
diff --git a/src/main/java/seedu/address/storage/JsonAdaptedPerson.java b/src/main/java/seedu/address/storage/JsonAdaptedPerson.java
index 1252757da8a..cab409290dd 100644
--- a/src/main/java/seedu/address/storage/JsonAdaptedPerson.java
+++ b/src/main/java/seedu/address/storage/JsonAdaptedPerson.java
@@ -18,6 +18,7 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.preferredtime.PreferredTime;
 import seedu.address.model.tag.Tag;
 
 /**
@@ -33,6 +34,7 @@ class JsonAdaptedPerson {
     private final String address;
     private final List<JsonAdaptedTag> tags = new ArrayList<>();
     private final List<JsonAdaptedGame> games = new ArrayList<>();
+    private final List<JsonAdaptedPreferredTime> preferredTimes = new ArrayList<>();
 
 
     /**
@@ -42,7 +44,8 @@ class JsonAdaptedPerson {
     public JsonAdaptedPerson(@JsonProperty("name") String name, @JsonProperty("phone") String phone,
             @JsonProperty("email") String email, @JsonProperty("address") String address,
             @JsonProperty("tags") List<JsonAdaptedTag> tags,
-            @JsonProperty("games") List<JsonAdaptedGame> games) {
+            @JsonProperty("games") List<JsonAdaptedGame> games,
+            @JsonProperty("preferred times") List<JsonAdaptedPreferredTime> preferredTimes) {
         this.name = name;
         this.phone = phone;
         this.email = email;
@@ -53,6 +56,9 @@ public JsonAdaptedPerson(@JsonProperty("name") String name, @JsonProperty("phone
         if (games != null) {
             this.games.addAll(games);
         }
+        if (preferredTimes != null) {
+            this.preferredTimes.addAll(preferredTimes);
+        }
     }
 
     /**
@@ -69,6 +75,9 @@ public JsonAdaptedPerson(Person source) {
         games.addAll(source.getGames().values().stream()
                 .map(JsonAdaptedGame::new)
                 .collect(Collectors.toList()));
+        preferredTimes.addAll(source.getPreferredTimes().stream()
+                .map(JsonAdaptedPreferredTime::new)
+                .collect(Collectors.toList()));
     }
 
     /**
@@ -85,6 +94,10 @@ public Person toModelType() throws IllegalValueException {
         for (JsonAdaptedGame game : games) {
             personGames.put(game.getGameName(), game.toModelType());
         }
+        final List<PreferredTime> personPreferredTimes = new ArrayList<>();
+        for (JsonAdaptedPreferredTime preferredTime: preferredTimes) {
+            personPreferredTimes.add(preferredTime.toModelType());
+        }
 
         if (name == null) {
             throw new IllegalValueException(String.format(MISSING_FIELD_MESSAGE_FORMAT, Name.class.getSimpleName()));
@@ -120,8 +133,9 @@ public Person toModelType() throws IllegalValueException {
 
         final Set<Tag> modelTags = new HashSet<>(personTags);
         final Map<String, Game> modelGames = new HashMap<>(personGames);
+        final Set<PreferredTime> modelPreferredTimes = new HashSet<>(personPreferredTimes);
 
-        return new Person(modelName, modelPhone, modelEmail, modelAddress, modelTags, modelGames);
+        return new Person(modelName, modelPhone, modelEmail, modelAddress, modelTags, modelGames, modelPreferredTimes);
     }
 
 }
diff --git a/src/main/java/seedu/address/storage/JsonAdaptedPreferredTime.java b/src/main/java/seedu/address/storage/JsonAdaptedPreferredTime.java
new file mode 100644
index 00000000000..2d04ab1f775
--- /dev/null
+++ b/src/main/java/seedu/address/storage/JsonAdaptedPreferredTime.java
@@ -0,0 +1,69 @@
+package seedu.address.storage;
+
+import static seedu.address.model.preferredtime.PreferredTime.VALIDATED_PATTERN;
+
+import java.util.regex.Matcher;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+import seedu.address.commons.exceptions.IllegalValueException;
+import seedu.address.model.preferredtime.Day;
+import seedu.address.model.preferredtime.PreferredTime;
+import seedu.address.model.preferredtime.Time;
+
+
+
+/**
+ * Jackson-friendly version of {@link PreferredTime}.
+ */
+public class JsonAdaptedPreferredTime {
+
+    private final String preferredTime;
+
+    /**
+     * Constructs a {@code JsonAdaptedPreferredTime} with the given {@code preferredTime}.
+     */
+    @JsonCreator
+    public JsonAdaptedPreferredTime(String preferredTime) {
+        this.preferredTime = preferredTime;
+    }
+
+    /**
+     * Converts a given {@code PreferredTime} into this class for Jackson use.
+     */
+    public JsonAdaptedPreferredTime(PreferredTime source) {
+        preferredTime = source.preferredTime;
+    }
+
+    @JsonValue
+    public String getPreferredTime() {
+        return preferredTime;
+    }
+
+    /**
+     * Converts this Jackson-friendly adapted game object into the model's {@code PreferredTime} object.
+     *
+     * @throws IllegalValueException if there were any data constraints violated in the adapted preferred time.
+     */
+    public PreferredTime toModelType() throws IllegalValueException {
+        if (!PreferredTime.isValidPreferredTime(preferredTime)) {
+            throw new IllegalValueException(PreferredTime.MESSAGE_CONSTRAINTS);
+        }
+
+        Matcher matcher = VALIDATED_PATTERN.matcher(preferredTime); // should always match as checked
+        if (!matcher.matches()) {
+            throw new IllegalArgumentException("Invalid preferred time format: " + preferredTime);
+        }
+
+        if (!Day.isValidDay(matcher.group(1))) {
+            throw new IllegalValueException(Day.MESSAGE_CONSTRAINTS);
+        }
+
+        if (!Time.isValidTime(matcher.group(2))) {
+            throw new IllegalValueException(Time.MESSAGE_CONSTRAINTS);
+        }
+
+        return new PreferredTime(preferredTime);
+    }
+}
diff --git a/src/test/data/JsonSerializableAddressBookTest/typicalPersonsAddressBook.json b/src/test/data/JsonSerializableAddressBookTest/typicalPersonsAddressBook.json
index 72262099d35..d283bdb6e69 100644
--- a/src/test/data/JsonSerializableAddressBookTest/typicalPersonsAddressBook.json
+++ b/src/test/data/JsonSerializableAddressBookTest/typicalPersonsAddressBook.json
@@ -5,42 +5,49 @@
     "phone" : "94351253",
     "email" : "alice@example.com",
     "address" : "123, Jurong West Ave 6, #08-111",
-    "tags" : [ "friends" ]
+    "tags" : [ "friends" ],
+    "preferred times": ["Monday 1200"]
   }, {
     "name" : "Benson Meier",
     "phone" : "98765432",
     "email" : "johnd@example.com",
     "address" : "311, Clementi Ave 2, #02-25",
-    "tags" : [ "owesMoney", "friends" ]
+    "tags" : [ "owesMoney", "friends" ],
+    "preferred times": [ ]
   }, {
     "name" : "Carl Kurz",
     "phone" : "95352563",
     "email" : "heinz@example.com",
     "address" : "wall street",
-    "tags" : [ ]
+    "tags" : [ ],
+    "preferred times": [ ]
   }, {
     "name" : "Daniel Meier",
     "phone" : "87652533",
     "email" : "cornelia@example.com",
     "address" : "10th street",
-    "tags" : [ "friends" ]
+    "tags" : [ "friends" ],
+    "preferred times": [ ]
   }, {
     "name" : "Elle Meyer",
     "phone" : "9482224",
     "email" : "werner@example.com",
     "address" : "michegan ave",
-    "tags" : [ ]
+    "tags" : [ ],
+    "preferred times": [ ]
   }, {
     "name" : "Fiona Kunz",
     "phone" : "9482427",
     "email" : "lydia@example.com",
     "address" : "little tokyo",
-    "tags" : [ ]
+    "tags" : [ ],
+    "preferred times": [ ]
   }, {
     "name" : "George Best",
     "phone" : "9482442",
     "email" : "anna@example.com",
     "address" : "4th street",
-    "tags" : [ ]
+    "tags" : [ ],
+    "preferred times": [ ]
   } ]
 }
diff --git a/src/test/java/seedu/address/model/person/PersonTest.java b/src/test/java/seedu/address/model/person/PersonTest.java
index dabb3743f39..ae01ee0ff97 100644
--- a/src/test/java/seedu/address/model/person/PersonTest.java
+++ b/src/test/java/seedu/address/model/person/PersonTest.java
@@ -88,13 +88,17 @@ public void equals() {
         // different tags -> returns false
         editedAlice = new PersonBuilder(ALICE).withTags(VALID_TAG_HUSBAND).build();
         assertFalse(ALICE.equals(editedAlice));
+
+        // different tags -> returns false
+        editedAlice = new PersonBuilder(ALICE).withPreferredTimes("Monday 2100").build();
+        assertFalse(ALICE.equals(editedAlice));
     }
 
     @Test
     public void toStringMethod() {
         String expected = Person.class.getCanonicalName() + "{name=" + ALICE.getName() + ", phone=" + ALICE.getPhone()
                 + ", email=" + ALICE.getEmail() + ", address=" + ALICE.getAddress() + ", tags=" + ALICE.getTags()
-                + ", games=" + ALICE.getGames() + "}";
+                + ", games=" + ALICE.getGames() + ", preferred times=" + ALICE.getPreferredTimes() + "}";
         assertEquals(expected, ALICE.toString());
     }
 }
diff --git a/src/test/java/seedu/address/storage/JsonAdaptedPersonTest.java b/src/test/java/seedu/address/storage/JsonAdaptedPersonTest.java
index 47cbf0f098e..330256f69a4 100644
--- a/src/test/java/seedu/address/storage/JsonAdaptedPersonTest.java
+++ b/src/test/java/seedu/address/storage/JsonAdaptedPersonTest.java
@@ -23,6 +23,7 @@ public class JsonAdaptedPersonTest {
     private static final String INVALID_ADDRESS = " ";
     private static final String INVALID_EMAIL = "example.com";
     private static final String INVALID_TAG = "#friend";
+    private static final String INVALID_PREFERREDTIME = "Monday 4500";
 
     private static final String VALID_NAME = BENSON.getName().toString();
     private static final String VALID_PHONE = BENSON.getPhone().toString();
@@ -34,6 +35,9 @@ public class JsonAdaptedPersonTest {
     private static final List<JsonAdaptedGame> VALID_GAMES = BENSON.getGames().values().stream()
             .map(JsonAdaptedGame::new)
             .collect(Collectors.toList());
+    private static final List<JsonAdaptedPreferredTime> VALID_PREFERREDTIME = BENSON.getPreferredTimes().stream()
+            .map(JsonAdaptedPreferredTime::new)
+            .collect(Collectors.toList());
 
     @Test
     public void toModelType_validPersonDetails_returnsPerson() throws Exception {
@@ -43,8 +47,8 @@ public void toModelType_validPersonDetails_returnsPerson() throws Exception {
 
     @Test
     public void toModelType_invalidName_throwsIllegalValueException() {
-        JsonAdaptedPerson person =
-                new JsonAdaptedPerson(INVALID_NAME, VALID_PHONE, VALID_EMAIL, VALID_ADDRESS, VALID_TAGS, VALID_GAMES);
+        JsonAdaptedPerson person = new JsonAdaptedPerson(INVALID_NAME, VALID_PHONE, VALID_EMAIL, VALID_ADDRESS,
+                VALID_TAGS, VALID_GAMES, VALID_PREFERREDTIME);
         String expectedMessage = Name.MESSAGE_CONSTRAINTS;
         assertThrows(IllegalValueException.class, expectedMessage, person::toModelType);
     }
@@ -52,16 +56,15 @@ public void toModelType_invalidName_throwsIllegalValueException() {
     @Test
     public void toModelType_nullName_throwsIllegalValueException() {
         JsonAdaptedPerson person = new JsonAdaptedPerson(null, VALID_PHONE, VALID_EMAIL, VALID_ADDRESS,
-                VALID_TAGS, VALID_GAMES);
+                VALID_TAGS, VALID_GAMES, VALID_PREFERREDTIME);
         String expectedMessage = String.format(MISSING_FIELD_MESSAGE_FORMAT, Name.class.getSimpleName());
         assertThrows(IllegalValueException.class, expectedMessage, person::toModelType);
     }
 
     @Test
     public void toModelType_invalidPhone_throwsIllegalValueException() {
-        JsonAdaptedPerson person =
-                new JsonAdaptedPerson(VALID_NAME, INVALID_PHONE, VALID_EMAIL, VALID_ADDRESS,
-                        VALID_TAGS, VALID_GAMES);
+        JsonAdaptedPerson person = new JsonAdaptedPerson(VALID_NAME, INVALID_PHONE, VALID_EMAIL, VALID_ADDRESS,
+                VALID_TAGS, VALID_GAMES, VALID_PREFERREDTIME);
         String expectedMessage = Phone.MESSAGE_CONSTRAINTS;
         assertThrows(IllegalValueException.class, expectedMessage, person::toModelType);
     }
@@ -69,15 +72,15 @@ public void toModelType_invalidPhone_throwsIllegalValueException() {
     @Test
     public void toModelType_nullPhone_throwsIllegalValueException() {
         JsonAdaptedPerson person = new JsonAdaptedPerson(VALID_NAME, null, VALID_EMAIL, VALID_ADDRESS,
-                VALID_TAGS, VALID_GAMES);
+                VALID_TAGS, VALID_GAMES, VALID_PREFERREDTIME);
         String expectedMessage = String.format(MISSING_FIELD_MESSAGE_FORMAT, Phone.class.getSimpleName());
         assertThrows(IllegalValueException.class, expectedMessage, person::toModelType);
     }
 
     @Test
     public void toModelType_invalidEmail_throwsIllegalValueException() {
-        JsonAdaptedPerson person =
-                new JsonAdaptedPerson(VALID_NAME, VALID_PHONE, INVALID_EMAIL, VALID_ADDRESS, VALID_TAGS, VALID_GAMES);
+        JsonAdaptedPerson person = new JsonAdaptedPerson(VALID_NAME, VALID_PHONE, INVALID_EMAIL, VALID_ADDRESS,
+                VALID_TAGS, VALID_GAMES, VALID_PREFERREDTIME);
         String expectedMessage = Email.MESSAGE_CONSTRAINTS;
         assertThrows(IllegalValueException.class, expectedMessage, person::toModelType);
     }
@@ -85,15 +88,15 @@ public void toModelType_invalidEmail_throwsIllegalValueException() {
     @Test
     public void toModelType_nullEmail_throwsIllegalValueException() {
         JsonAdaptedPerson person = new JsonAdaptedPerson(VALID_NAME, VALID_PHONE, null, VALID_ADDRESS,
-                VALID_TAGS, VALID_GAMES);
+                VALID_TAGS, VALID_GAMES, VALID_PREFERREDTIME);
         String expectedMessage = String.format(MISSING_FIELD_MESSAGE_FORMAT, Email.class.getSimpleName());
         assertThrows(IllegalValueException.class, expectedMessage, person::toModelType);
     }
 
     @Test
     public void toModelType_invalidAddress_throwsIllegalValueException() {
-        JsonAdaptedPerson person =
-                new JsonAdaptedPerson(VALID_NAME, VALID_PHONE, VALID_EMAIL, INVALID_ADDRESS, VALID_TAGS, VALID_GAMES);
+        JsonAdaptedPerson person = new JsonAdaptedPerson(VALID_NAME, VALID_PHONE, VALID_EMAIL, INVALID_ADDRESS,
+                VALID_TAGS, VALID_GAMES, VALID_PREFERREDTIME);
         String expectedMessage = Address.MESSAGE_CONSTRAINTS;
         assertThrows(IllegalValueException.class, expectedMessage, person::toModelType);
     }
@@ -101,7 +104,7 @@ public void toModelType_invalidAddress_throwsIllegalValueException() {
     @Test
     public void toModelType_nullAddress_throwsIllegalValueException() {
         JsonAdaptedPerson person = new JsonAdaptedPerson(VALID_NAME, VALID_PHONE, VALID_EMAIL, null,
-                VALID_TAGS, VALID_GAMES);
+                VALID_TAGS, VALID_GAMES, VALID_PREFERREDTIME);
         String expectedMessage = String.format(MISSING_FIELD_MESSAGE_FORMAT, Address.class.getSimpleName());
         assertThrows(IllegalValueException.class, expectedMessage, person::toModelType);
     }
@@ -110,8 +113,17 @@ public void toModelType_nullAddress_throwsIllegalValueException() {
     public void toModelType_invalidTags_throwsIllegalValueException() {
         List<JsonAdaptedTag> invalidTags = new ArrayList<>(VALID_TAGS);
         invalidTags.add(new JsonAdaptedTag(INVALID_TAG));
-        JsonAdaptedPerson person =
-                new JsonAdaptedPerson(VALID_NAME, VALID_PHONE, VALID_EMAIL, VALID_ADDRESS, invalidTags, VALID_GAMES);
+        JsonAdaptedPerson person = new JsonAdaptedPerson(VALID_NAME, VALID_PHONE, VALID_EMAIL, VALID_ADDRESS,
+                invalidTags, VALID_GAMES, VALID_PREFERREDTIME);
+        assertThrows(IllegalValueException.class, person::toModelType);
+    }
+
+    @Test
+    public void toModelType_invalidPreferredTimes_throwsIllegalValueException() {
+        List<JsonAdaptedPreferredTime> invalidPreferredTimes = new ArrayList<>(VALID_PREFERREDTIME);
+        invalidPreferredTimes.add(new JsonAdaptedPreferredTime(INVALID_PREFERREDTIME));
+        JsonAdaptedPerson person = new JsonAdaptedPerson(VALID_NAME, VALID_PHONE, VALID_EMAIL, VALID_ADDRESS,
+                VALID_TAGS, VALID_GAMES, invalidPreferredTimes);
         assertThrows(IllegalValueException.class, person::toModelType);
     }
 
diff --git a/src/test/java/seedu/address/testutil/EditPersonDescriptorBuilder.java b/src/test/java/seedu/address/testutil/EditPersonDescriptorBuilder.java
index 54af27408bb..2722ff9d6aa 100644
--- a/src/test/java/seedu/address/testutil/EditPersonDescriptorBuilder.java
+++ b/src/test/java/seedu/address/testutil/EditPersonDescriptorBuilder.java
@@ -41,6 +41,7 @@ public EditPersonDescriptorBuilder(Person person) {
         descriptor.setAddress(person.getAddress());
         descriptor.setTags(person.getTags());
         descriptor.setGames(person.getGames());
+        descriptor.setPreferredTimes(person.getPreferredTimes());
     }
 
     /**
diff --git a/src/test/java/seedu/address/testutil/PersonBuilder.java b/src/test/java/seedu/address/testutil/PersonBuilder.java
index 9363c0d3871..05fb7b6fc0d 100644
--- a/src/test/java/seedu/address/testutil/PersonBuilder.java
+++ b/src/test/java/seedu/address/testutil/PersonBuilder.java
@@ -11,6 +11,7 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.preferredtime.PreferredTime;
 import seedu.address.model.tag.Tag;
 import seedu.address.model.util.SampleDataUtil;
 
@@ -30,6 +31,7 @@ public class PersonBuilder {
     private Address address;
     private Set<Tag> tags;
     private Map<String, Game> games;
+    private Set<PreferredTime> preferredTimes;
 
     /**
      * Creates a {@code PersonBuilder} with the default details.
@@ -41,6 +43,7 @@ public PersonBuilder() {
         address = new Address(DEFAULT_ADDRESS);
         tags = new HashSet<>();
         games = new HashMap<>();
+        preferredTimes = new HashSet<>();
     }
 
     /**
@@ -53,6 +56,7 @@ public PersonBuilder(Person personToCopy) {
         address = personToCopy.getAddress();
         tags = new HashSet<>(personToCopy.getTags());
         games = new HashMap<>(personToCopy.getGames());
+        preferredTimes = new HashSet<>(personToCopy.getPreferredTimes());
     }
 
     /**
@@ -78,6 +82,16 @@ public PersonBuilder withGames(String ... games) {
         this.games = SampleDataUtil.getGameMap(games);
         return this;
     }
+
+    /**
+     * Parses the {@code preferredTimes} into a {@code Set<PreferredTime>}
+     * and set it to the {@code Person} that we are building.
+     */
+    public PersonBuilder withPreferredTimes(String ... preferredTimes) {
+        this.preferredTimes = SampleDataUtil.getPreferredTimeSet(preferredTimes);
+        return this;
+    }
+
     /**
      * Sets the {@code Address} of the {@code Person} that we are building.
      */
@@ -103,7 +117,7 @@ public PersonBuilder withEmail(String email) {
     }
 
     public Person build() {
-        return new Person(name, phone, email, address, tags, games);
+        return new Person(name, phone, email, address, tags, games, preferredTimes);
     }
 
 }
diff --git a/src/test/java/seedu/address/testutil/TypicalPersons.java b/src/test/java/seedu/address/testutil/TypicalPersons.java
index 56e8b23d7f2..2f7fb99b384 100644
--- a/src/test/java/seedu/address/testutil/TypicalPersons.java
+++ b/src/test/java/seedu/address/testutil/TypicalPersons.java
@@ -26,11 +26,12 @@ public class TypicalPersons {
     public static final Person ALICE = new PersonBuilder().withName("Alice Pauline")
             .withAddress("123, Jurong West Ave 6, #08-111").withEmail("alice@example.com")
             .withPhone("94351253")
-            .withTags("friends").withGames().build();
+            .withTags("friends").withGames()
+            .withPreferredTimes("Monday 1200").build();
     public static final Person BENSON = new PersonBuilder().withName("Benson Meier")
             .withAddress("311, Clementi Ave 2, #02-25")
             .withEmail("johnd@example.com").withPhone("98765432")
-            .withTags("owesMoney", "friends").withGames().build();
+            .withTags("owesMoney", "friends").withGames().withPreferredTimes().build();
     public static final Person CARL = new PersonBuilder().withName("Carl Kurz").withPhone("95352563")
             .withEmail("heinz@example.com").withAddress("wall street").build();
     public static final Person DANIEL = new PersonBuilder().withName("Daniel Meier").withPhone("87652533")
@@ -53,7 +54,7 @@ public class TypicalPersons {
             .withEmail(VALID_EMAIL_AMY).withAddress(VALID_ADDRESS_AMY).withTags(VALID_TAG_FRIEND).build();
     public static final Person BOB = new PersonBuilder().withName(VALID_NAME_BOB).withPhone(VALID_PHONE_BOB)
             .withEmail(VALID_EMAIL_BOB).withAddress(VALID_ADDRESS_BOB).withTags(VALID_TAG_HUSBAND, VALID_TAG_FRIEND)
-            .withGames().build();
+            .withGames().withPreferredTimes().build();
 
     public static final String KEYWORD_MATCHING_MEIER = "Meier"; // A keyword that matches MEIER