[Balanor]

15 minutes real-time = 1 hour in Thay
6 hours real-time = 1 day in Thay
1 week real-time = ~1 month in Thay
3 months real-time = ~ 1 year in Thay

And easy way (maybe?) to remember all this is that time in real-life flows at one quarter of the speed that time flows in in-game Thay.