All City of San Mateo Libraries will be closed on the following days:
2018
- Monday, December 24: Christmas Eve
- Tuesday, December 25: Christmas Holiday
- Monday, December 31: New Year's Eve - Closing at 5pm
2019
- Tuesday, January 1: New Year's Day Holiday
- Monday, January 21: Martin Luther King, Jr. Holiday
- Monday, February 18: Presidents' Day Holiday
- Monday, May 27: Memorial Day Holiday
- Thursday, July 4: Independence Day Holiday
- Monday, September 2: Labor Day Holiday
- Monday, October 14: Staff Development Day*
- Monday, November 11: Veterans Day Holiday
- Wednesday, November 27: Day before Thanksgiving - Closing at 5pm
- Thursday, November 28: Thanksgiving Holiday
- Tuesday, December 24: Christmas Eve
- Wednesday, December 25: Christmas Holiday
- Tuesday, December 31: New Year's Eve - Closing at 5pm
*Libraries will be closed for in-service training of Library employees.