Islamic Studies
Caliphate & Rulers: From the Rightly Guided Caliphs to the Ottoman Caliphate
When was the Ottoman Caliphate officially abolished?
Explanation
The Ottoman Caliphate was officially abolished on March 3, 1924 CE (1342 AH) by Mustafa Kemal Ataturk.
Reference: Islamic Studies - Caliphate & Rulers
, Page 10