Earliest Time for Mincha, Said Too Early

The Aish Rabbi Replies

The Mincha prayer corresponds to the daily afternoon Tamid offering brought in the Temple. The earliest time that could be brought was at the start of the afternoon, when the sun first moves to the west of the meridian and its shadows begin to tilt towards the east. This is considered to occur only half an hour after midday (measuring from sunrise to sunset), when such shadows are noticeable. (We are further stringent in the summer to count this half hour relative to the length of the day, considering one hour to be 1/12’th of daylight.) Thus, the earliest time for Mincha is approximately half an hour after astronomical midday, and a bit longer than 30 minutes later in the summer.

However, some authorities maintain that the afternoon Tamid can be offered immediately after midday, not only 30 minutes later. Thus, if you recited Mincha right after midday, it would also count and you wouldn’t repeat Mincha. However, if you prayed before midday entirely, it would not count at all and must be repeated.

You can find accurate halachic times for virtually all locations worldwide at MyZmanim (aish.com retrieves Shabbat times from there as well).

(Sources: Shulchan Aruch 233:1, Mishna Berurah 2 with Sha'ar Tziyun 6, 8.)