How to use this tool
Choose a start and end date. Optionally include the end date: January 1 to January 2 is 1 day normally or 2 days inclusively.
Good to know
Counts calendar days using UTC date arithmetic, avoiding daylight-saving changes. Includes weekends and holidays. Dates must be valid Gregorian dates between years 1000 and 9999. If dates are reversed, the result reports the absolute gap and notes the order.