Convert Dates

Number of days between September 12, 2011 and May 8, 2023

The total number of days between Monday, September 12, 2011 and Monday, May 8, 2023 is 4256 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 4257 days.

If you're counting workdays or weekends, there are 3041 weekdays and 1216 weekdays.

September 12, 2011 is a Monday. It is the 255th day of the year, and in the 37th week of the year (assuming each week starts on a Sunday), or the 3rd quarter of the year. There are 30 days in this month. 2011 is a leap year, so there are 365 days in this year. The short form for this date used in the United States is 09/12/2011, and almost everywhere else in the world it's 12/09/2011.

May 8, 2023 is a Monday. It is the 128th day of the year, and in the 19th week of the year (assuming each week starts on a Sunday), or the 2nd 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 05/08/2023, and almost everywhere else in the world it's 08/05/2023.