Date Calculators Time and Date Duration – Calculate duration, with both date and time included Date Calculator – Add or subtract days, months, years Weekday Calculator – What day is this …

The date of the equinoxes and solstices varies because a year in our calendar does not exactly match the length of the tropical year —the time it takes the Earth to complete an orbit around …

Modern timekeeping defines a day as the sum of 24 hours – but it's not that simple. Earth's rotation slows down over time. See the exact day length for today, yesterday, and tomorrow.

This calculator is helpful for any time-related task that crosses time zone boundaries. For example, if a project is due next Tuesday at 12:00 UTC —how far off is the deadline in your …

Search for a city's Sunrise and Sunset: Sunrise, Sunset, dusk, dawn and twilight, Sun distance, day length, altitude, and much more...

The difference between the time measured by the Sun and the time measured by our clocks is known as the equation of time.

Common wisdom suggests that day and night on the equinox are of equal length. However, the day is slightly longer than the night at most locations on Earth.

Even though most people consider June 21 as the date of the June solstice, it can happen anytime between June 20 and June 22, depending on the time zone. June 22 solstices are …

The exact length of a tropical year can vary by up to around half an hour. For instance, the tropical year 2032 will last longer than 365 days and 6 hours. 2027, however, will only last 365 days, 5 …

Nov 1, 2025 · Generic astronomy calculator to calculate times for sunrise, sunset, moonrise, moonset for many cities, with daylight saving time and time zones taken in account.