# How do I calculate the latest time to start the third Shabbos meal on erev Yom Tov?

From myzemanim.com for where I live, for this Shabbos, erev Shovuos, the “sho’o zemanis” (Proportional Hour) Gra & Baal Tanya is 1hr:22mins. Nightfall - 3 Stars is around 10:30 pm. Shkia is around 9:20 pm.

How do I calculate the latest time to start Sholosh seudas “sho’o asiris”?

Are there any leniencies bearing in mind the length of the sho’o zemanis?

• 3 * 82 min = 246 min = 4 hr 6 min. 9:20 - 4 hr 6 min = 5:14 – Double AA May 23 '12 at 18:20
• Can you clarify what you mean by "Are there any leniencies bearing in mind the length of the sho’o zemanis?" – Double AA May 23 '12 at 18:49
• Three clock hours = 3 hours. Three sho’os zemaniyos = 4 clock hours approx. (1) Do we really need to wait 4 clock hours? (2) We can't eat until after nightfall (and maariv). This is (at least) another 70 minutes later. – Avrohom Yitzchok May 23 '12 at 19:28
• I don't see how either of those will lead to a kula in terms of seudah shelishit. But you should CYLOR regarding if you can say maariv and/or kiddush before tzeit as there are some kulas to be found in that area. – Double AA May 23 '12 at 19:31