This site provides an online "Days From Date" calculator to help you find the date that occurs exactly X days from a particular date. You can also enter a negative number to find out when X days before that date happened to fall. You can use this tool to figure out a deadline if you have a certain number of days remaining. Or read the full page to learn more about the due date if you're counting business days or weekdays only, skipping Saturday and Sunday.

Note: If you're trying to measure the number of days between two dates, you can switch to the Date Difference calculator instead. Or if you want to choose a day in the week and count how many times it occurs in a given year, try out the How Many Days calculator.

›› September, 2020 calendar

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Today is Sunday, September 20th, 2020. It is the 264th day of the year, and in the 38th week of the year (assuming each week starts on a Monday). There are 30 days in this month. 2020 is a leap year, so there are 366 days in this year.