The first inbound trains leave outer terminals around 5:00 am on weekdays, 6:00 am on Saturdays, and 8:00 am on Sundays and most holidays. (The previous 4:00 am weekday start time was changed to 5:00 am for three years starting on February 11, 2019 to accommodate retrofitting of the Transbay Tube. That project also reduced weekday evening service from every 20 minutes to every 24 minutes to allow for construction work in one track of the Tube during those times.) The last inbound trains leave their terminals around midnight, with the final Antioch–SFO/Millbrae line and Berryessa/North San José–Richmond line trains in both directions meeting at MacArthur station for guaranteed transfers.