Tax Day: 2 Bay Area post offices open until 8:30 p.m. tonight. Bay City News Service. Posted: 04/15/2014 07:47:45 AM PDT. Updated: 04/15/2014 12:53:52 PM PDT. Copyright © 2014 by Bay City News, Inc. ...Republication, re-transmission or reuse without the express written consent of Bay City News, Inc. is prohibited.While post offices will not be keeping different hours on tax day, two post offices in the Bay Area are open late in case any late filers cannot make it during regular retail hours Tuesday.ax Day: 2 Bay Area post offices open until 8:30 p.m. tonight. Bay City News Service. Posted: 04/15/2014 07:47:45 AM PDT. Updated: 04/15/2014 12:53:52 PM PDT. Copyright © 2014 by Bay City News, Inc. ...