Tikkun Leil Shavuot

Etymology
From ; literally, "rectification for Shavuot Night".

Proper noun

 * 1)  A special service for the evening of Shavuot, involving the study of Jewish sources, particularly the Jewish bible and postbiblical law materials all night on the holiday of Shavuot.

Translations

 * Hebrew:
 * Russian: Тикку́н лейл шавуо́т