Adams_Umass_Boston wrote: ↑Thu Feb 24, 2022 4:26 pm "Green Line extension to Union Square will open Monday, March 21st with revenue service starting that afternoon, says MBTA GM Poftak."
In the good ol' days, the MTA would schedule opening day on a Saturday so that commuters wouldn't be squeezed by rail fans on opening day or give Monday-Friday rail fans a chance to see the new line.