Convert Dates

Number of days between January 12, 2010 and March 21, 2023

The total number of days between Tuesday, January 12, 2010 and Tuesday, March 21, 2023 is 4816 days.

This does not include the end date, so it's accurate if you're measuring your age in days, or the total days between the start and end date. But if you want the duration of an event that includes both the starting date and the ending date, then it would actually be 4817 days.

If you're counting workdays or weekends, there are 3441 weekdays and 1376 weekdays.

January 12, 2010 is a Tuesday. It is the 12nd day of the year, and in the 2nd week of the year (assuming each week starts on a Sunday), or the 1st quarter of the year. There are 31 days in this month. 2010 is a leap year, so there are 365 days in this year. The short form for this date used in the United States is 01/12/2010, and almost everywhere else in the world it's 12/01/2010.

March 21, 2023 is a Tuesday. It is the 80th day of the year, and in the 12nd week of the year (assuming each week starts on a Sunday), or the 1st quarter of the year. There are 31 days in this month. 2023 is a leap year, so there are 365 days in this year. The short form for this date used in the United States is 03/21/2023, and almost everywhere else in the world it's 21/03/2023.