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Date Calculators

Date calculators for the three questions people ask most: how many days lie between two dates, what date it is a number of days from today, and when a half birthday falls.

Date arithmetic looks simple until a month boundary, a leap year or a weekend gets in the way. The days between dates calculator counts the days, weeks, months and working days in a span, and the days from today calculator finds the date a number of days, weeks or months away.

The half birthday calculator moves a birthday six calendar months on. All of them work on calendar days, so a change to or from daylight saving time never adds or drops a day.

Working days in 2027, month by month

Working days are Monday to Friday, without the eleven US federal holidays in 5 U.S.C. 6103 on the days federal offices observe them. 2027 has 249 working days out of 261 weekdays. That is twelve days off, because New Year's Day 2028 is observed on Friday, December 31, 2027.

Bar chart of working days in each month of 2027 after US federal holidays: January 19, February 19, March 23, April 22, May 20, June 21, July 21, August 22, September 21, October 20, November 20, December 21; 249 in the year out of 261 weekdays.
261 weekdays in 2027, 249 once the federal holidays are taken out.

To count the working days left until a last day at work, the retirement countdown does the same sum from today.

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