Megillat Taanit

Megillat Taanit (Hebrew: מגילת תענית‎), lit. "the Scroll of Fasting," is an ancient text, in the form of a chronicle, which enumerates 35 eventful days on which the Jewish nation either performed glorious deeds or witnessed joyful events. Despite the name of the scroll, these days were celebrated as feast-days. Public mourning was forbidden on 14 of them, and public fasting on all.

The work was probably written late in the Second Temple period, perhaps from 40–70 CE in the 1st century. The last event dated without dispute is Emperor Caligula's order to place a statue of himself in the Second Temple (c. 39 CE). A few scholars think it references events after the destruction of the Temple in 70 CE, but references to it in other literature suggest it certainly existed by the 2nd century. The author of the work is unknown, although various rabbinic works speculate on how it was composed.