"What time zone is Texas in?" has two correct answers. Houston, Dallas and Austin are on Central Time, while El Paso is on Mountain Time, an hour behind the rest of the state. Florida, Kentucky, Tennessee, Michigan and nine other states work the same way:

India vs US Time Difference: Why the Gap Changes Twice a Year

For most of the year, India is 9 hours 30 minutes ahead of New York. From November 1, 2026 to March 14, 2027, it is 10 hours 30 minutes ahead. India's clocks do not change in either case. The whole difference comes from the United

Why Israel Changes Its Clocks on a Different Schedule Than Europe

Israel's clocks now fall back on the same day the European Union's do, the last Sunday of October, a deliberate alignment written into a 2013 law. But the two systems still don't match. Israel springs forward on the Friday before the EU's last Sunday of

Why North Korea Changed Its Time Zone Twice in One Decade

North Korea turned its clocks back 30 minutes on August 15, 2015, breaking from South Korea and Japan to create its own "Pyongyang Time," then reversed the entire move less than three years later, on May 5, 2018, realigning with Seoul again. Both changes were

Understanding Time

View all

The Hour That Happens Twice: What Actually Occurs at 1:30 AM When Clocks Fall Back

At 1:59:59 a.m. on Sunday, November 1, 2026, clocks in New York will not tick over to 2:00. They will jump back to 1:00:00 a.m., and the next 60 minutes will replay. Every time from 1:00 to 1:59 happens twice that night, once on Eastern

Why the International Space Station Runs on UTC Instead of Local Time

Astronauts aboard the International Space Station see the sun rise and set 16 times in a 24-hour period, once every 90 to 93 minutes, as the station circles Earth at roughly 28,000 kilometers per hour. No conventional time zone survives contact with that kind of

Standard Time vs Daylight Time: What’s the Actual Difference

Most people assume "Standard Time" is the normal, default setting and "Daylight Time" is some separate seasonal overlay that temporarily replaces it. That mental model is backwards in a way that federal law makes explicit, and once you see the actual legal language, the whole

How Accurate Are Atomic Clocks: How Much Do They Actually Drift

In 2015, physicists at JILA in Colorado built a strontium clock so stable that, if it had started running 15 billion years ago, before the universe itself existed, it would still be within one second of correct today. That number sounds like marketing. It isn't.