How to use the Time Duration CalculatorThis page explains how to use the Time Duration Calculator that calculates the number of days, minutes, hours and seconds between two dates with time.
The order of the Day, Month and Year fields depend on your browser's language settings or the order specified in the Site configuration. If the day, month and year are left empty, the current UTC/GMT date is used as default. If the time fields are left empty, they default to the start of the day (Midnight/00:00).
|Day||1–31||The date of month|
|Month||1–12||The month as a number or an English month names (e.g. jan or January)|
|Year||1–3999||The year as a number of as roman numerals (e.g. MCMIX). Please enter four digits (e.g. 1960, not just 60) unless you really want to do calculations between dates around 2000 years ago.|
|Today||-||Click the button to fill in with today's date|
|Hour||0–23||Enter the hour either as a 24-hour format, or a 12-hour format, with "am" or "pm" after the number, e.g. "18" or "6 pm"|
|Now||-||Click button to fill in current local time from your browser|
|Start of day||-||Click button for 00:00/Midnight or start of the day|
|Noon||-||Click button for 12:00/Noon|
|No Time||-||Go to the date-only duration calculator|
Change from Julian to Gregorian calendar
If the start date is in the Julian calendar and the end date in the Gregorian calendar, this will be adjusted for and reported on the result page.
The old Julian calendar was replaced by the Gregorian calendar which caused a number of days to be lost, depending on when the change happened, the calendar used by the date calculator can be changed in the Country/System setting in the Site configuration.
Linking to the duration calculator
Generally you are allowed to link to the duration calculator from your site, with just a few exceptions as outlined in the Link policy.
Just go to the page that should be linked, and copy the URL/Address from the browser. You can also link to the results page or to a pre-filled form, with default values. To do this, fill in the fields, click "Calculate duration" and then the "Modify the current calculation". That page will contain all values as parameters in the URL so that any other users will see the same values.
Help and example use
- Duration between two dates – Calculates number of days
- Time and Date Duration – Calculate between exact times (not just dates)
- Date Calculator – Add or subtract days, months, years
- Birthday Calculator – Find when you are 1 billion seconds old