Zmanim According to Chabad
This page explains the bundled Chabad profile in iKaluach, based on Chabad.org’s published calculation method.
The rav and his community
Rabbi Schneur Zalman of Liadi, known as the Alter Rebbe and Baal HaTanya, founded Chabad Chassidism. His works include the Tanya and Shulchan Aruch HaRav, and his halachic teachings remain central to Chabad religious life.
The method’s character
Proportional hours run between internal endpoints called Hanetz Amiti and Shkiah Amitis. These differ from the displayed sunrise and sunset used for practical daytime observance. Dawn and nightfall follow solar angles, so their distance from sunrise or sunset changes with location and season.
| Zman | Plain-language rule |
|---|---|
| Alot | Sun’s center 16.9 degrees below the horizon, morning |
| Misheyakir | Sun’s center 10.2 degrees below the horizon, morning |
| Sof Zman Shema | 3 proportional hours after Hanetz Amiti |
| Sof Zman Tefillah | 4 proportional hours after Hanetz Amiti |
| Sof Achilat Chametz | 4 proportional hours after Hanetz Amiti |
| Sof Biur Chametz | 5 proportional hours after Hanetz Amiti |
| Chatzot | Midpoint between Hanetz Amiti and Shkiah Amitis |
| Mincha Gedolah | Half a proportional hour after Chatzot |
| Preferred Mincha threshold | Whichever is later: Mincha Gedolah or 30 regular clock minutes after Chatzot |
| Mincha Ketana | 2.5 proportional hours before Shkiah Amitis |
| Plag | 1.25 proportional hours before Shkiah Amitis |
| Tzeit | Sun’s center 6 degrees below the horizon, evening |
| Shabbat and Yom Tov end | Sun’s center 8.5 degrees below the horizon, evening |
| Chatzot Halaylah | Midpoint between tonight’s Shkiah Amitis and tomorrow’s Hanetz Amiti |
Selecting the profile
Choose Chabad as the Zmanim Shita for a location to use the complete profile. The app then displays the Chabad-specific preferred Mincha threshold and Chatzot Halaylah in addition to the applicable daily zmanim.
A note about dawn
Some Israeli Chabad tables also include a disputed earlier dawn opinion described as 120 minutes before sunrise on reference days. The same calendar identifies the later 72-minute opinion as present practice. The earlier opinion is included here only as supplementary background, not as a second standard profile.