The Kingdom of Loathing has two moons, Ronald and Grimace. Their phases affect various factors of the game. The phases and effects are shown below. Stat Day means that gains for that stat are increased by 15% on that day. The Grue column indicates whether it is dark enough for the Grue familiar on that day. The Wereseal column shows the strength change given by the Blood of the Wereseal on that day. Next, of course, is the next RL occurence of that phase.

Ronald Grimace Stat Day Grue Wereseal Next
Moxie Yes -100% July 11
Yes -75% July 12
Yes -25% July 13
Yes 0% July 14
Mysticality No +50% July 15
No +25% July 16
No +25% July 17
Yes 0% Today
Muscle Yes 0% July 3
Muscle No +25% July 4
No +25% July 5
No +50% July 6
Mysticality No +50% July 7
No +25% July 8
Yes -25% July 9
Moxie Yes -50% July 10