Game Editor is an open source 2D game creator that allows you to develop games for a wide variety of operating systems and mobile devices. Naturally, due to the program's open source nature, you have the ability to view and alter its source code.
You can find out more at Game Editor's home page.
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 | Ash Wednesday 46 days before Easter Sunday (February or March) |
 | Easter Between March 22nd to April 25th |
 | Greek Independence Day March 25th |
 | March Madness March through first week of April |
 | Mardi Gras / Shrove Tuesday / Carnaval / Carnival Tuesday before Ash Wednesday (February or March) |
| | Palm Sunday Sunday before Easter |
 | St. Patrick's Day March 17th |
| More holidays | |