January 13 is the 13th day of the year in the Gregorian calendar. There are 352 days remaining until the end of the year (353 in leap years).
It is sometimes celebrated as New Year's Eve (at least in the 20th & 21st centuries) by countries and organisations still using the thirteen-days-adrift Julian calendar (Old New Year).
Read more about January 13: Events, Births, Deaths, Holidays and Observances