As you know, Monday is not only a day off work and/or school, it's Martin Luther King, Jr. Day.
Join others from the Bay Area celebrating what he accomplished. There's a march and rally in San Francisco, which you can get to by public transit from the City or from the South Bay.
Join the 24th annual Freedom Train on Monday, January 19th, on Caltrain from San Jose into San Francisco. This is an additional train running into the city just for the Martin Luther King Jr. celebration; you cannot use regular Caltrain tickets for it (for ticket info, call the numbers below).
The train leaves San Jose's Dirdiron station at 9:30, stopping in Sunnyvale, Palo Alto and San Mateo, arriving at 4th and King Streets in San Francisco at 11:16. From there, either join the march, or take MUNI to to Civic Center for the Dr. Martin Luther King Junior celebration.
The march leaves the Caltrain station at 11:30, and heads to Civic Center. While the march ends around 1:30, there's also a rally at the Bill Graham Auditorium (Civic Center) from 12:30 to 3:30.
To buy Freedom Train tickets, call 408.428.9551 or 408.435.7499. Or buy regular Caltrain tickets and just take a different Caltrain train.