CIBC Branches will be closed Thursday December 25 for Christmas Day and Friday December 26 for Boxing Day. ATMs at most locations will be available throughout the holiday period. CIBC Online Banking, CIBC Mobile Banking and CIBC Telephone Banking are available 24 hours a day, 7 days a week. Please note: Transactions conducted on weekends and holidays or after 6 p.m. EST will be effective the next business day.