Save the date! Suisun Valley is bringing back its signature event, Passport Sunday, on Aug. 8 and tickets go on sale this Tuesday, June 15. Just in time for the upcoming harvest season, the 2021 Passport Sunday celebration will be from 11 am to 4 pm Aug. 8. Hosted by the Suisun Valley Vintners and Growers Association, eight venues with 12 different wineries will be participating, offering the best of their wine and specialty products to visitors. Tickets on sale…