Convert Dates

Number of days between May 17, 2017 and September 18, 2018

The total number of days between Wednesday, May 17, 2017 and Tuesday, September 18, 2018 is 489 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 490 days.

If you're counting workdays or weekends, there are 350 weekdays and 140 weekdays.

May 17, 2017 is a Wednesday. It is the 137th day of the year, and in the 20th 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. 2017 is a leap year, so there are 365 days in this year. The short form for this date used in the United States is 05/17/2017, and almost everywhere else in the world it's 17/05/2017.

September 18, 2018 is a Tuesday. It is the 261st day of the year, and in the 38th 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. 2018 is a leap year, so there are 365 days in this year. The short form for this date used in the United States is 09/18/2018, and almost everywhere else in the world it's 18/09/2018.