January31

January 31 is the 31st and final day of January, completing the month in the Gregorian calendar. The date recurs every year, and January always has 31 days. In astrology, people born on January 31 are typically associated with the sun sign Aquarius, reflecting the time frame of late January.

Historically, January 31 has hosted several notable events. In 1865, the United States House of Representatives passed the Thirteenth Amendment to the Constitution, a pivotal step toward abolition of slavery in the United States. In 1958, Explorer 1 was launched from Cape Canaveral, marking the first successful American satellite and confirming the existence of the Van Allen radiation belts.

Notable births on January 31 include Jackie Robinson (1919), the groundbreaking Major League Baseball player; Justin Timberlake (1981), the singer and actor; and Portia de Rossi (1973), the actress and activist.

In religious and cultural calendars, January 31 is observed as the feast day of Saint John Bosco in the Roman Catholic tradition. The date is also associated with World Leprosy Day, which is observed on the last Sunday of January in many years. These observances reflect the date’s cross-cultural usage across calendars, commemorations, and public life.