The Ulrisin Empire, even post-civil war, moves on a calendar based on the Lunar Cycle. Every new moon is the start of a new cycle, and every full moon is mid-cycle. For clarity, months are referred to as cycles.  

There are 12 cycles in a year, three cycles per season, 30 days per cycle, 6 days per week, and 5 weeks per cycle.

Note: In-game time is equivalent to 1 OOC day for every 2 IRP day. Though this is for official use and can be flexible per the player's preference. Aka if you and another player decide that actions your character is doing is directly the day after another event or action. Typically it wouldn't make sense for more than a week to pass between interactions depending on the OOC time spent away. In-Game events will be dated IRP using this calendar. DM's will decide when an official year has passed in character.