Fiscal year end deadlines can be found at: https://businessservices.wisc.edu/accounting/year-end-accounting/
The deadlines listed are central campus deadlines. Please add time (at least 7 business days) to the front of any deadline to allow complete divisional review and approval. The more time, the better, if possible. It is totally understood needs are not known until the day of. A past deadline does not mean an order cannot be placed or a payment made. It only means there is no guarantee the order or payment will post in fiscal year 21. It is all about timing and letting folks know something is urgent.
For questions, contact your CALS accountant: https://bussvc.cals.wisc.edu/contacts-by-department/