If you are using the Merchant Calendar program or wanted info on moon phases, here are some important dates of astronomical events for the moons Ral and Guthay. In a game these may have important significance to one particular culture or another. Specifically, the Moon Priests of Draj are known for their worship of the two moons.
These tables may be useful to help determine certain religious holidays or explain other cosmic events. Like when Ral or Guthay is full and alone, when both moons are new (darkest night), or when both moons are full (brightest night). The table for Ral corresponds to the Red Moon Hunt of Gulg.
I have all tables here for easy access and reference. Again, these are set to correspond to with the Merchant Calendar program. You may want to adjust the dates forward or back one depending or your game, but these all should be pretty close you what you see there. Enjoy.