I've just released a beta version 0.4 of DateCalc, which is a simple calculator for dates. Main features are:
- Adding or substracting number of days to/from any date.
- Calculating day difference between two dates.
- Determining weekday of a date.
- 7 programmable preset buttons and "Today" button.
- Program is localized (no *.cd file available yet).
- Time range is from year 1 to 9999 using proleptic gregorian calendar.
Program is available here. As it is beta, there is no manual, icon and readme file yet. The interface is mostly self-explanatory however. You can discuss any bugs or feature requests here. DateCalc is freeware and will stay freeware in the future.

[ Edited by Krashan on 2010/5/9 8:12 ]

Nice! tested and it worked (it's working) with no problem. Thanks!!
... ehm... I couldn't find the MorphOS 2.5 preset key...

DateCalc 0.5
- Icon added.
- Polish locale.
- *.cd file for translations to other languages (German is done already, will be included in the next version).
- Many minor GUI fixes.

[DOWNLOAD]

Suggestions:

Enter any date to get the day name.

Conversion to and from Japanese calendar (Nengo). For the Japanese calendar you need to keep a list of the reign of each emperor; for example 2010 A.D. <-> Heisei 22.

Conversion to and from Thai calendar (Buddhist era). For the Thai calendar you add 543 to the date, 2010 A.D. <-> 2553 B.E. I think some other countries may also use B.E.

+2 more weeks button

Enter any date to get the day name.

It is simple. Enter the date as the first argument, then press either "+ Days" or "- Days" (it does not matter which one), then immediately press "=". The second argument will be automatically set to 0. Then you have the weekday name in the result.

As for any exotic calendar - I can easily add them for output format, allowing input for them is another story however. For example you can't enter these Japanese dates with only numerical keys...

DateCalc has got Polish, German and Italian locale. More translations anyone?

Hi !

in french :
http://beworld.perso.sfr.fr/datecalc

BeWorld

Hello Krashan,

My Folder Icon for DateCalc if you want

http://www.lafarigoule.org/morphos/download/DateCalc.lha

Regards
Patbest

DateCalc 1.0 is released and available on MorphOS Files. Features of this version:

- A few minor bugs fixed.
- User manual in English and Polish.
- Nice program icon.
- Translations in German, French, Italian and Polish.