Monday is Martin Luther King Day, a holiday for most city, county, state and federal employees.
If Monday is your day for city garbage pickup, you'll have to wait until Tuesday. San Antonio residents who normally have recyclables and garbage collection on Tuesday, will be moved to Wednesday this week.
Schools, banks and post offices will be closed, so don't bother checking the mailbox.
If you're driving downtown, you won't have to feed the parking meters and Via buses are operating on a Saturday schedule. 
