Ali ibn Husayn Zayn al-Abidin (died680)

Ali ibn al-Husayn al-Sajjad, also known as Zayn al-Abidin was the great-grandson of the Islamic prophet Muhammad, and the fourth imam in Shia Islam, succeeding his father, Husayn ibn Ali, his uncle, Hasan ibn Ali, and his grandfather, Ali ibn Abi Talib.

January 4 is the fourth day of the year in the Gregorian calendar; 361 days remain until the end of the year.