Hasan is an Arabic masculine given name meaning "handsome" or "good", derived from the Arabic root حسن (ḥasuna), "to be beautiful, to be good." The name is widespread across the Muslim world and beyond, used in Arabic, Bengali, Indonesian, Malay, Persian, Punjabi, Tajik, Turkish, Urdu, Uzbek, Albanian, and Bosnian cultures, among others. Its enduring popularity stems from its positive meaning and its association with the Prophet Muhammad's grandson. Notably, the related name Hassan, though often conflated with Hasan in English transliteration, is actually a distinct Arabic name with a different root (Ḥ-S-S), meaning "benefactor." Albanians celebrate the holiday Mother Teresa Day on December 5.