By Eliezer Brodt
This article will trace some of the earliest sources for the Minhag observed by many to stay up learning Torah throughout the entire night of Shavuos.[1] At the outset I would like to note that the focus of this article will be not be about the exact seder that was learned i.e. Tikun Lel Shavuos.[2]
Different versions of this article originally appeared in the Kulmos Supplement of Mishpacha in 2014 and then in English in 2015. I returned to all this in my doctorate Halachic Commentaries to the Shulchan Aruch on Orach Chayim from Ashkenaz and Poland in the Seventeenth Century.[3] This post contains important additions to some of the earlier versions. One day I hope to update it properly.
That the minhag of staying up on Shavuos night to learn was observed widely in recent history is very clear. For example, the author of a nineteenth-century Lithuanian memoir describes how her brothers would stay up the entire night.[4]
In a memoir about Yeshivas Lomza, the author writes in passing "after staying up the whole night, the whole yeshiva would take part in a milchig kiddush at the Rosh Yeshiva’s house".[5]












