The second game of a Giants-Pirates doubleheader is called at the top of the 9th due to rain, 28 minutes short of the Sunday curfew, with the Giants leading, 5 – 3. If the rain had started before the end of the 8th, the game would have gone to the Pirates by a score of 3 – 2. The umpires almost rule it a suspended game rather than a called game, because they feel they have to wait at least half an hour before calling a game, which would set the time two minutes after the curfew. But a Giants vice president finds the rule that puts weather and similar conditions first when determining whether a game is called or suspended.

On May 22, 1955 — The second game of a Giants-Pirates doubleheader is called at the top of the 9th due to rain, 28 minutes short of the Sunday curfew, with the Giants leading, 5 – 3. If the rain had started before the end of the 8th, the game would have gone to the Pirates by a score of 3 – 2. The umpires almost rule it a suspended game rather than a called game, because they feel they have to wait at least half an hour before calling a game, which would set the time two minutes after the curfew. But a Giants vice president finds the rule that puts weather and similar conditions first when determining whether a game is called or suspended.

Source:
Baseball Reference May 22