20230115

20230115 refers to the calendar date January 15, 2023, written in the compact numeric form YYYYMMDD. In ISO 8601 notation the same date is written as 2023-01-15. It was a Sunday and the 15th day of the year, which in 2023 had 365 days.

January is the first month of the Gregorian calendar. The date marks the early part of winter in the Northern Hemisphere and the early part of summer in the Southern Hemisphere. Because it is near the start of the year, this date is often used in planning and scheduling for fiscal, academic, and cultural events.

Notable historical events associated with this date include the launch of Wikipedia on January 15, 2001, a free online encyclopedia created by Jimmy Wales and Larry Sanger as a complementary project to Nupedia. The launch contributed to rapid expansion of user-generated content and online collaborative editing.

In computing and data handling, the 20230115 format is used as a stable, lexicographically sortable date key. Representing dates without a time component helps ensure unambiguous sorting across systems and locales. It is commonly employed in filenames, databases, and data exchange where time-of-day information is not required. See also ISO 8601 and date notation practices.