What does AM and PM stand for on a clock? Is noon 12 pm and midnight 12 am? How do times on a 12-hour clock relate to the 24-hour format?

Find the time difference between several cities with the Time Difference Calculator. Provides time zone conversions taking into account daylight saving time (DST), local time zone and accepts present, …

Find the exact time difference with the Time Zone Converter – Time Difference Calculator which converts the time difference between places and time zones all over the world.

World time and date for cities in all time zones. International time right now. Takes into account all DST clock changes.

Easily calculate new dates and times by adding or subtracting seconds, minutes, hours, days, weeks, months, or years from a given date.

Calculate local times for sunrises, sunsets, meridian passing, Sun distance, altitude and twilight, dusk and dawn times.

Calculations of sunrise and sunset in London – England – United Kingdom for January 2026. Generic astronomy calculator to calculate times for sunrise, sunset, moonrise, moonset for many cities, with …

Create a Countdown Timer that counts down in seconds, minutes, hours and days to any date, with time zone support. It also counts up from a past date.

Interactive night sky map for London, England, United Kingdom. Which planets, stars, constellations, and comets are visible tonight?

Customizable World Clock that shows current local time in the cities of your choice.