20200101

20200101 is a numeric date that represents January 1, 2020 in the YYYYMMDD format. In ISO 8601 notation, the same day is written as 2020-01-01. The compact form 20200101 is commonly used in databases, filenames, and software to encode a calendar date without separators, which allows straightforward lexical sorting and comparison.

January 1, 2020 was the first day of the year 2020 in the Gregorian calendar. It fell on a Wednesday and is observed as New Year's Day in many countries, typically marked by public holidays, ceremonies, and fireworks. 2020 was a leap year, so February had 29 days, and the year began the 2020s decade for some cultural and historical contexts.

As a calendar notation, 20200101 is often used as a stable key in data systems, enabling unambiguous, sortable representations of dates across administrative and technical domains. While widely understood in contexts that use the Gregorian calendar, interpretation may differ in systems employing other calendars or time standards.