Calendar Widget (com.eastgrams.simplecalendar) on Google Play
This is a simple easy to use month calendar widget that can display national public holiday of about 38 countries.It is full customizable that you can change it’s color, text size and transparent.it uses Enrico Service (http://kayaposoft.com/enrico/) to display national public holiday.you can find the list of supported countries and it regionsfrom Enrico Service website.(http://holidays.kayaposoft.com/)you can use it without public holiday if you want.