Due to the setting sun creating a potential hazard for batters, night games were scheduled for several decades with an 8:00 PM start. Years later, night games were scheduled for earlier starting times then delayed in progress until the sun had set and it was safe for the batters. The last in-game sun delay took place on July 3, 1996 and lasted three minutes. Since 1997, the game's first pitch during the summer months takes place after the sun sets and is based on a timetable that has been updated annually by the official scorer. During this part of the season, the time of the game's first pitch ranges from 7:15 PM to 7:45 PM. A large steel and sheet metal screen (125 by 50 feet) was constructed in left-center field, but it only offers a minimal amount of help since the measurements for the sun screen were taken during the off season prior to 1993 when the setting sun was not a factor.