Degos of Mosstone
Faerun’s many civilized people’s generally accept Dale Reckoning as the sensible calender and history. It was formed by the Dale humans who, eons ago spawned the Common tongue and spread their species across the globe.
The DR calender uses a 5 day week with a year containing 73 such weeks. Spring is the longest season (to account for the rampant growth) and as such contains 24 weeks. Summer is the second longest season and is defined by 17 weeks. Fall and Winter have an even 16 weeks apiece.