The Moon phase adjustments are really trivial. E.g. luck is increased by 1 during a full Moon (and you already need to handle luck anyway; basically your total

The Moon phase adjustments are really trivial. E.g. luck is increased by 1 during a full Moon (and you already need to handle luck anyway; basically your total luck is setting a modifier on how likely good/bad events are to happen). Or a cockatrice will always turn you to stone when it attacks on a new Moon instead of having a 10% chance of doing so (this can trivially be implemented on top of any kind of source of random numbers).