| 14 May 2012 | Added common dates set: «Nederlands», Dutch (Nederlands) | |
| 25 Apr 2012 | Ultimate Calendar 1.5.1 Final released | |
| 09 Apr 2012 | Ultimate Calendar 1.5.1 RC released | |
| 02 Apr 2012 | Ultimate Calendar 1.5.1 Beta released | |
| 21 Sep 2011 | Ultimate Calendar 1.5 Final released | |
| 25 Nov 2010 | Added additional dates set: «Іменини», Ukrainian (Українська) | |
| 20 Sep 2010 | Additional dates sets are avaliable for downloading | |
| 30 Mar 2010 | Added language: Spanish (Español) | |
| 08 Mar 2010 | Ultimate Calendar 1.1 Final released | |
| 10 Dec 2009 | Added language: Croatian (Hrvatski) | |
| 08 May 2009 | Added language: Hebrew (עברית) | |
| 04 May 2009 | Trial version: Cut the restriction on the use languages – to release included all available language files | |
| 29 Apr 2009 | Ultimate Calendar 1.0 Final released | |
