From the CME Globex Control Center, here is the summary of KEY changes, per CME market segment
Thursday, December 31, 2020 - Regular 'Normal" Closing Times (except Dairy)
*Any open positions must meet Exchange Maintenance Margin 15 Minutes before CLOSE: https://www.ampfutures.com/trading-info/margins/
Friday, January 1, 2021 - All Markets CLOSED
CME New Years Holiday Schedule: December 31, 2020 - January 4, 2021
View Full List: https://www.ampfutures.com/trading-info/holiday-hours/
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