When Does Shabbat End?

From Halachipedia

There are a number of different positions regarding how to calculate the amount of time that exists between sunset late Shabbat afternoon and when Shabbat ends.

The Shulchan Aruch is of the opinion that Shabbat ends when one is able to see three small stars in the sky that are close in proximity to one another.[1]

  1. According to Sephardim, a Yireh Shamayim should be strict to refrain from Melacha until 72 minutes after sunset like Rabbenu Tam.[2] These 72 minutes are proportional to the length of the day, and do not depend on current location.[3]
  2. According to Sephardim, it is permitted for someone who keeps Rabbenu Tam time to ask someone who doesn't keep Rabbenu Tam time to do Melacha for him.[4]

Sources

  1. Shulchan Aruch, O"C 293:2
  2. Yalkut Yosef 293:3
  3. Zmanim KHalacha, page 43, quoting Hacham Ovadia zt"l. Hence, 72 minutes would be 1.2 multiplied by the day's shaa zmanit.
  4. Yalkut Yosef 293:11