Generally speaking - 5 PM US Central on Sunday to 4 PM US Central each weekday. With markets re-opening each day at 5 PM US central.
CME group financial products trade from 5 PM US Central on Sunday to 4 PM US Central each weekday, re-opening at 5 PM each weekday evening, and closing for the week at 4 PM US Central on Friday.
CME Group agricultural products trade from 7 PM US Central on Sunday to 7:45 AM US Central, then from 8:30 AM US Central to 1:20 PM US Central each weekday, re-opening at 7 PM each weekday evening, and closing for the week at 1:20 PM US Central on Friday.
EUREX trading hours are from 6 PM US Central on Sunday to 3 PM US Central each weekday, re-opening each weekday evening at 6 PM US Central, and closing for the week at 3 PM US Central on Friday.
In contrast, the US stock market is open from 8 AM to 3 PM US Central, Monday through Friday.