Below are links to holiday and hours of operation information for NYSE Euronext's markets.
NYSE is open from Monday through Friday, 9:30 a.m. to 4:00 p.m. ET., except on U.S. holidays.
The European markets of NYSE Euronext are open Monday to Friday from 09:00 to 17:30 CET, except on select holidays.
NYSE Liffe's Derivatives markets will be open Monday to Friday throughout 2012, except on select holidays.
Although NYSE Arca follows the same holiday schedule as the NYSE, on days when the NYSE closes early NYSE Arca hours may vary due to their extended trading day.
Trading hours at NYSE MKT Equities are Monday through Friday 9:30 a.m. to 4:00 p.m. ET. NYSE Amex Options trading hours vary by product.