diff --git a/moment-timezone.js b/moment-timezone.js
index e53f3256..25a9b6af 100644
--- a/moment-timezone.js
+++ b/moment-timezone.js
@@ -161,6 +161,34 @@
 			}
 		},
 
+		offsetChanges: function (from, to) {
+			var fromIndex = this._index(from),
+			  toIndex = this._index(to),
+				changes = [],
+				i;
+			for (i = fromIndex; i < toIndex; i++) changes.push(this.untils[i]);
+			return changes;
+		},
+
+		offsetNext: function (timestamp) {
+			var index = this._index(timestamp);
+			if (index === undefined) {
+				return undefined;
+			}
+			return this.untils[index];
+		},
+
+		offsetPrevious: function (timestamp) {
+			var index = this._index(timestamp);
+			if (index === undefined) {
+				return undefined;
+			}
+			if (index < 1) {
+				return undefined;
+			}
+			return this.untils[index-1];
+		},
+
 		parse : function (timestamp) {
 			var target  = +timestamp,
 				offsets = this.offsets,
diff --git a/tests/moment-timezone/zone.js b/tests/moment-timezone/zone.js
index 8dac8c14..9d8d32ce 100644
--- a/tests/moment-timezone/zone.js
+++ b/tests/moment-timezone/zone.js
@@ -38,6 +38,43 @@ exports.zone = {
 		test.done();
 	},
 
+	offsetChanges: function(test) {
+		var zone = new tz.Zone(PACKED),
+		  from = 1200 * 60000,
+		  to =  1400 * 60000,
+		  expected = [ 1240 * 60000, 1340 * 60000 ];
+		test.deepEqual(zone.offsetChanges(from, to), expected, "The offsetChanges from " + from + "to" + to + "  should be " + expected);
+		from = 0;
+		expected = [ 1000 * 60000, 1100 * 60000, 1240 * 60000, 1340 * 60000 ];
+		test.deepEqual(zone.offsetChanges(from, to), expected, "The offsetChanges from " + from + "to" + to + "  should be " + expected);
+		to = 1500 * 60000;
+		expected = [ 1000 * 60000, 1100 * 60000, 1240 * 60000, 1340 * 60000, 1480 * 60000 ];
+		test.deepEqual(zone.offsetChanges(from, to), expected, "The offsetChanges from " + from + "to" + to + "  should be " + expected);
+		test.done();
+	},
+
+	offsetNext: function(test) {
+		var zone = new tz.Zone(PACKED),
+		  timestamp = 1050 * 60000,
+		  expected = 1100 * 60000;
+		test.equal(zone.offsetNext(timestamp), expected, "The offsetNext of " + timestamp + " should be " + expected);
+		timestamp = 1150 * 60000;
+		expected = 1240 * 60000;
+		test.equal(zone.offsetNext(timestamp), expected, "The offsetNext of " + timestamp + " should be " + expected);
+		test.done();
+	},
+
+	offsetPrevious: function(test) {
+		var zone = new tz.Zone(PACKED),
+		  timestamp = 1050 * 60000,
+		  expected = 1000 * 60000;
+		test.equal(zone.offsetPrevious(timestamp), expected, "The offsetNext of " + timestamp + " should be " + expected);
+		timestamp = 1150 * 60000;
+		expected = 1100 * 60000;
+		test.equal(zone.offsetPrevious(timestamp), expected, "The offsetNext of " + timestamp + " should be " + expected);
+		test.done();
+	},
+
 	abbr : function (test) {
 		var zone = new tz.Zone(PACKED),
 			tests = [