After today's afternoon Orioles game, the park will be reopened at 6pm. The formal ceremony is from 6-7, but the park will remain open until 9pm, and fans will have the option to walk around the warning track and view exhibits about Pesky's illustrious Red Sox career.
From the Red Sox release about the event:
While the formal portion of the ceremony is set to take place between 6-7 p.m., fans are welcome to stay until the park closes at 9 p.m. Both current and former Red Sox players will be in attendance.Will I see any of you there?
In addition to hearing stories about Pesky’s 70-year career, fans will have the opportunity to walk on the warning track and see displays that illustrate his life as a player, coach, manager, broadcaster, ambassador, patriot, husband, father, and friend. Fans will also have the opportunity to write personal messages that will be given to his family and become part of the Nation’s Archives at Fenway Park.