Tradeweb observes the holidays below and will remind clients when the Market will be closed or will close early. 

US Products Open
Canadian Products Early close at 1pm NY time
CAD IRS Early close at 1pm NY time

US ETFs Open
US Convertible Bonds Open
US Options Open
All Other US Products Closed
Canadian Products Closed
CAD IRS Closed

US Products Closed
Canadian Products Open
CAD IRS Open
Japanese Products Open
Australasian Products Open
Credit and SAS Products Open
Equity Derivatives Open
European Products Open during LDN & TKY hours
Chinese Products Open

US ETFs Early close at 1:30pm NY time
US Convertible Bonds Early close at 1:30pm NY time
US Options Early close at 1:30pm NY time
Repo Open
All Other US Products Early close at 2pm NY time, Closed during TKY hours
CAD IRS Open
Canadian Products Open
Japanese Products Closed
Equity Derivatives Open
European Products Open during LDN hours only
Chinese Products Open

US ETFs Early close at 1:30pm NY time
US Convertible Bonds Early close at 1:30pm NY time
US Options Early close at 1:30pm NY time
Repo Open
All Other US Products Early close at 2pm NY time, Closed during TKY hours
CAD IRS Early close at 1pm NY time
Canadian Products Early close at 1pm NY time (same as CAD IRS)
Japanese Products Closed
Equity Derivatives Open
European Products Open with early close at 12.30pm, closed during Asia hours
Chinese Products Open

US Products Closed
Canadian Products Closed
CAD IRS Closed
European Products Closed
Australasian Products Closed
Japanese Products Open during TKY hours only
Credit and SAS products Closed
Equity Derivatives Closed
Chinese Products Open

European Products  
ECDS Closed
UK Products Closed
Australasian Products Closed
Japanese Products Open during TKY hours only
Credit and SAS products Closed
Equity Derivatives Closed
Canadian Products Closed
CAD IRS Closed
US Products Open during TKY & US hours only
Chinese Products Open

US ETFs Open
US Convertible Bonds Open
US Options Open
Repo Open
All Other US Products Early close at 2pm NY time, closed during TKY hours
Canadian Products Early close at 1pm NY time
CAD IRS Early close at 1pm NY time
Japanese Products Closed
Australasian Products Open
Credit and SAS Products Open
European Products Open with early close at 12.30pm, closed during Asia hours
Chinese Products Closed