Time & Dates

What Is UTC?

Coordinated Universal Time (UTC) is the primary time standard used to regulate clocks worldwide. Time zones are expressed as offsets from UTC, such as UTC−5 for New York in winter or UTC+5:30 for India. UTC itself never changes for daylight saving time.

UTC vs. GMT

For everyday use they show the same time. UTC is a scientific standard based on atomic clocks, while GMT is a time zone used by the United Kingdom in winter.

Converting Time Zones

Local time = UTC + the zone's offset. To convert between two zones, convert the first to UTC and then apply the second zone's offset.

🧮 Calculate It Yourself

Put Coordinated Universal Time (UTC) into practice with these free calculators — no sign-up, nothing stored.

🌍 Time Zone Converter Convert any date and time between world time zones, with daylight saving time handled automatically. Calculate → 🗓️ Meeting Planner (Time Zones) Find the best meeting time across up to four time zones. Calculate →

🔗 Related Terms

Daylight Saving Time (DST) ISO Week Number 24-Hour Clock (Military Time)

More Time & Dates Terms

📖 Browse all glossary terms or explore all free calculators.

Last updated: September 27, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.