This plugin stores date and time in game variables accesible by map events.
There are games where special things happen on specific day of the week, specific hour, specific day, and so on. There are games where time continues even when off.
With this plugin you can do both.
Time is stored in game variables and can be used inside events. Automatically updates on map changes, but can also be updated manually.
Also you can store time and check how many real time has passed. Time is stored as minutes.