I want a ship to appear and a fog cloud at lets say Wednesday 6pm and no other time. Once enabled and the quest connected to it completed the ship will remain there for good. If player misses a the time window of Wednesday 6-8pm the ship will be disabled until the following Wednesday at 6pm. Can anybody script this for me? Thanks.

Can't you use a packages? It's very simple to schedule behavior with those.

A package on a static object? Is that possible?