Zmanim · The prayers of the day
Until what time can you pray Shacharit?
The morning Amidah, the standing prayer at the heart of Shacharit, may be said until the end of the fourth halachic hour of the day, and the Shema until the end of the third; because these hours stretch and shrink with the length of daylight, the exact clock time changes with your day and your city.
The window the tradition draws
Jewish prayer is not only words; it is words in their hour. The morning has two thresholds. The Shema, the declaration that Hashem is one, belongs to the first third of the day and should be said before the end of the third halachic hour. The Amidah of Shacharit, the standing prayer, reaches until the end of the fourth hour. If the fourth hour passes and you have not yet prayed, the tradition does not simply close the door: after the fact one may still say the Amidah until חצות (chatzot, halachic midday), though the preferred time has gone by. These are real limits, and they are also generous ones.
Why the hours move
A halachic hour is not sixty fixed minutes. The daylight, however long or short, is divided into twelve equal parts, and each part is one hour. So the end of the fourth hour arrives earlier on a short winter morning and later on a long summer one, and it is not the same in your city as in another. This is why a Jew asks not only what time is it but what hour is it here, today. The limit depends on the day and on the place.
The source
These times are set out in the Shulchan Aruch, Orach Chaim 89, the code that gathers the law of the morning prayer. It names the end of the fourth hour for the Amidah and, after the fact, chatzot as the outer edge.
What to do
Find out when the third and fourth halachic hours end where you live today, and aim to have the Shema said within the first and Shacharit within the second. If a morning gets away from you, you have not lost the prayer: say the Amidah until chatzot and know that it counts. The clock is real, and so is the room the tradition leaves you.
Source: Shulchan Aruch, Orach Chaim 89.
When you want those hours drawn for the very morning you are living, My Jewish Day (siddur, zmanim, the Hebrew calendar) holds the siddur and the times of the day together, so the words and their hour arrive as one.
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