April 16 is observed in Algeria as Day of Knowledge (Youm El Ilm), commemorating the death anniversary of Sheikh Abdelhamid Ben Badis, a leading reformer and religious scholar.
- Benbadis – A family name meaning son of Badis, rooted in Arabic. It is most closely associated with Sheikh Abdelhamid Ben Badis (1889–1940), founder of the Association of Algerian Muslim Ulama and a key figure in Algeria’s cultural and educational revival.
