This mod adds a simple and customizable calender system.
The calendar supports days, weeks, months and years. Holidays are also supported.
To make things simpler, all months have the same length.
By default, a year has 12 months (January to December) with 30 days each. There are 7 weekdays from Monday to Sunday, starting at Monday. The calendar starts at Day 1, Month 1 (January), Year 1.