Guides

Daylight Saving Time Around the WorldWhich countries observe daylight saving time? Full list of DST rules by country, start and end dates, and who recently abolished it. Eu dst abolitionThe EU wants to end seasonal clock changes, but it hasn't happened yet. Here is the true status of EU DST abolition as of 2026. France most time zonesFrance has 13 time zones, more than any other country, because of its overseas territories spread across the globe. France has 13 time zones, more tha Half-Hour and Quarter-Hour Time ZonesWhy some countries like India, Nepal, and Newfoundland use 30 or 45 minute offsets. Full list, history, and travel impact. Major Historical Time Zone Changes Around the WorldWhy countries change time zones, from Samoa skipping a day to China's single zone. Major shifts, offsets, and how to look up historical data. How Many Time Zones Are There?The real count of world time zones: 24, 38, or 600+. Why the number changes depending on UTC offsets, politics, and the IANA database. Leap secondsEarth's rotation is slowing. Leap seconds keep atomic clocks in sync with the sun. Here is how they work and when they will stop. Morocco dst ramadanMorocco pauses daylight saving time for Ramadan, shifting clocks back one hour. Here is how it works and when it changes next. Nepal time zone 45 minutesWhy Nepal is UTC+5:45, the only country with a 45-minute offset. History, geography, and how it affects your calls. If you have ever tried to schedule Samoa date line shiftWhy Samoa skipped a day in 2011. How the date line moved west, what happened to clocks, and when the next change comes. On 30 December 2011, Samoa ski The IANA Time Zone Database: What It Is and How It WorksWhat the IANA time zone database is, who maintains it, how zone names work, and how updates reach your phone, laptop, and server. The World's Strangest Time ZonesFrom Nepal’s 45-minute offset to Kiribati’s UTC+14, here are the weirdest time zones on Earth and why they exist. At the same moment, it can be 10:30 Time Zone Abbreviations: Why They Are AmbiguousThree letters like IST or CST can mean different times in three different countries. Here is why abbreviations fail and what to use instead. Managing Time Zones in Remote TeamsPractical guide for remote teams: async-first workflows, overlap windows, DST rules, rotating meetings, and scheduling tools. Time Zones for DevelopersStore in UTC, display in local time. Use IANA zone names, not offsets. Handle DST gaps and overlaps. Language-specific guidance. Time zones in russiaRussia spans 11 time zones from Kaliningrad to Kamchatka. Find the current offset for any Russian region, plus when clocks next change. Complete List of UTC OffsetsComplete list of all 38 UTC offsets currently in use, from UTC-12 (Baker Island) to UTC+14 (Line Islands), with explanations of fractional offsets, DS UTC vs GMT: What Is the Difference?UTC is an atomic time standard; GMT is a solar time zone. Learn the difference, when they match, and which one to use. If you set a meeting for 14:00 The International Date Line ExplainedThe International Date Line is an imaginary line where the calendar day changes. Crossing it eastward subtracts a day; westward adds one. What Time Do They Use on the ISS and in Space?The International Space Station uses Coordinated Universal Time (UTC). Here is how space time works and why it matters. The International Space Statio Time Zones in AntarcticaAntarctica uses all time zones and none. Find out how research stations pick their time and what time it is at the South Pole right now. Why China Has Only One Time ZoneChina spans 4,800 km but uses one time zone. Here is why five zones became one in 1949 and what that means for daily life.