Shivah Asar Betammuz

[ Sephardic Hebrew shee-vah ah-sahr bi-tah-mooz; Ashkenazic Hebrew shiv-uh aw-suhr bi-tah-moo z, shi-vaw aw-sawr ]
/ Sephardic Hebrew ʃiˈvɑ ɑˈsɑr bɪˈtɑ muz; Ashkenazic Hebrew ˈʃɪv ə ˈɔ sər bɪˈtɑ mʊz, ʃɪˈvɔ ɔˈsɔr /

noun

a Jewish fast day observed on the 17th day of Tammuz in memory of the breach of the walls of Jerusalem by the Romans in a.d. 70.

Origin of Shivah Asar Betammuz

From the Hebrew word shibhʿāh ʿāśār bə tammuz 17th day of Tammuz