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Techolm

Time & Date Tools

Date and time tools calculate with calendars and clocks: counting the days between two dates, working out an age, adding hours and minutes, converting between time zones and reading Unix timestamps. They also run timers, show calendars and week numbers, and give moon phases and the sunrise and sunset times for your location.

Subcategories

Tools

  • Countdown Timer

    Count down from a set number of hours, minutes and seconds, with an alert sound when time is up.

    Coming soon

  • Time Zone Converter

    Convert a date and time between cities and time zones, with daylight saving time taken into account.

    Coming soon

  • Age Calculator

    Work out an exact age in years, months and days from a date of birth, on today's date or any other.

    Coming soon

  • Days Between Dates Calculator

    Count the days, weeks and months between two dates, with the option to include the end date.

    Coming soon

  • Unix Timestamp Converter

    Convert Unix epoch time in seconds or milliseconds to a readable date in UTC or local time, and back.

    Coming soon

Frequently asked questions

Is the end date included when counting the days between two dates?

It depends on the convention you need. From 1 March to 3 March is 2 days if you count only the days that pass, and 3 days if you include both the start and end dates, so check which rule a date calculator uses.

What is the difference between UTC and GMT?

For everyday use they show the same time. Coordinated Universal Time (UTC) is the time standard, kept by atomic clocks, that time zones are defined from, while Greenwich Mean Time (GMT) is the time zone the United Kingdom uses in winter.

Why does the time difference between two cities change during the year?

The difference changes because many regions use daylight saving time and change their clocks on different dates, or not at all. New York and London are usually 5 hours apart, but for a few weeks each year the gap is 4 hours, because the United States and the United Kingdom switch on different weekends.