Planning a business trip or a holiday to another country, dont know about the list of Holidays in that country, no problem. VacWiki has a list of holidays for all the countries you planning a trip. It lists the reasons and the history behind the Holidays. You are better informed now.
The App will help you plan your trip in advance. Simply select the country and view the number of holidays, touch them to find individual holidays and reason for the holiday and yes links to Wikipedia to solve your curiosity.