All City of San Mateo Libraries will be closed on the following days:
2023- Sunday, January 1: New Year's Day Holiday
- Monday, January 2: New Year's Day Observance
- Monday, January 16: Martin Luther King Jr. Holiday
- Monday, February 20: Presidents’ Day Holiday
- Monday, May 29: Memorial Day Holiday
- Tuesday, July 4: Independence Day Holiday
- Monday, September 4: Labor Day Holiday
- Monday, October 9: Staff Development Day*
- Friday, November 10: Veterans Day Observance
- Wednesday, November 22: Day before Thanksgiving - Closing at 5pm
- Thursday, November 23: Thanksgiving Holiday
- Sunday, December 24: Christmas Eve
- Monday, December 25: Christmas Holiday
2024- Monday, January 1: New Year’s Day Holiday
*Libraries will be closed for in-service training of Library employees.