Remove the time
If you don't want to enter a time of day, click on Remove the time, which takes you to the Date Duration Calculator.
The Time Duration Calculator finds the number of days, hours, minutes, and seconds between 2 given points in time.
If you don't want to enter a time of day, click on Remove the time, which takes you to the Date Duration Calculator.
The Add time zone conversion link takes you to the Time Zone Duration Calculator where you can calculate the duration between a point in time in one time zone and a different point in time in another time zone.
The Count only workdays link takes you to the Business Days Calculator where you can exclude different days, like weekends and public holidays.
The calculator adds or subtracts the larger time units before the smaller time units. This means that it adds years, then months, then days. Although the total number of days in January (31) and February (28) are different, both are counted as 1 month. In some cases, this method can lead to unexpected results.
For example, in a common year, the time span between January 28 and March 1 is calculated as 1 month and 1 day (January 28 + 1 month = February 28; February 28 + 1 day = March 1).
However, the time span between January 31 and March 1 is also shown as 1 month and 1 day. The calculator first adds 1 month to jump from January to February. But since February only has 28 days in a common year, it lands on February 28 before adding 1 day to arrive at March 1.
This may seem illogical at first, but the structure of our calendar means that there is no perfect way of calculating dates including months and years.
Yes, all our calculators account for leap years.
No, this calculator does not account for leap seconds.
No, this calculator does not take DST changes into account.
The Time Duration Calculator does not allow for this. For Daylight Saving Time (DST) to be taken into account, you have to specify a location using the Time Zone Duration Calculator.
You can change the order of the Day, Month, and Year fields by selecting a different Short Date format in My Units.
To edit your calculation, scroll up to the top of the page, make your changes, and calculate again. The Make adjustment and calculate again is a shortcut to the top of the page.
This is most likely not an error but due to the fact that the Julian calendar was still in use in the year you entered. This calendar system was eventually replaced by today's Gregorian calendar, but the date this change happened differed from one country to another.
The calculator uses the Julian-Gregorian switch date of the country you select in the settings under My Units.
We are a small team with very extensive websites to manage, so, unfortunately, we do not have the capacity to share detailed information about our algorithms or provide programming help.
The General FAQ Page answers your questions about timeanddate.com, our services, site-wide settings, customization options, advertising opportunities, and copyright policies.
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