the service accepts the POST - query on "/holiday/forCountryPair" with body, with contains two country codes and date in YYYY-MM-DD format. It should be like:

{
	"firstCountryCode":"PL",
	"secondCountryCode":"DE",
	"date": "2016-01-01"
}

As a response, user can receive response with name's of holiday for chosen country:

{
    "name1": "Nowy Rok",
    "name2": "Neujahrstag",
    "date": "2016-01-01"
}

Service return just first holiday's name for every country, so if somewhere in world are more celebrations, it will be ignored. When there's no holiday, we get "_" as response:

{
    "name1": "_",
    "name2": "_",
    "date": "2016-12-31"
}

To run project: use runholidaypair.sh or open it in some IDE.