I am going into 1st year post high-school yeshiva and am trying to find the commonality between yeshivos' "zmanim"/semester length and their break times, particularly in 5781, as I have been told that some may differ. What I heard from one person(RC = Rosh Chodesh):
- Elul Zman: 1 month from RC Elul to Yom Kippur;
18 day break until RC Cheshvan
- Winter Zman: 5 months from RC Cheshvan until RC Nissan;
29 day break until RC Iyar
- Summer Zman: 3.3 months from Iyar to Tisha B'av;
20 day break until RC Elul
Is that what it was like for you? Your input is greatly appreciated.