Rogation of The Ninevites (Nineveh's Wish)
Assyrians of the Ancient Church of the East, Chaldean Catholic Church, Syriac Catholic Church, and Assyrian Church of the East observe a fast called Ba'uta d-Ninwe or Bo'utho d-Ninwe (ܒܥܘܬܐ ܕܢܝܢܘܐ) which means Nineveh's Wish. Copts and Ethiopian Orthodox also maintain this fast.
Read more about this topic: Nineveh