Time Zone Converter

Where utcOffset is the time zone difference from UTC in hours.

Convert 12:00 UTC to New York time (UTC-5 in winter, UTC-4 in summer):

1. New York is UTC-5 (EST) or UTC-4 (EDT)
2. 12:00 UTC - 5 hours = 7:00 AM EST
3. Or 12:00 UTC - 4 hours = 8:00 AM EDT (daylight saving)

Result: 7:00 AM or 8:00 AM depending on the date

1. Enter the time and select the source time zone
2. Select the target time zone
3. Click "Convert" to see the result

| Time Zone | UTC Offset | Example City | |-----------|------------|--------------| | UTC | 0 | London (winter) | | GMT | 0 | London (winter) | | EST | -5 | New York (winter) | | EDT | -4 | New York (summer) | | CST | -6 | Chicago (winter) | | CDT | -5 | Chicago (summer) | | MST | -7 | Denver (winter) | | MDT | -6 | Denver (summer) | | PST | -8 | Los Angeles (winter) | | PDT | -7 | Los Angeles (summer) | | CET | +1 | Paris (winter) | | CEST | +2 | Paris (summer) | | JST | +9 | Tokyo | | AEST | +10 | Sydney | | NZST | +12 | Auckland |

Many time zones observe daylight saving time (DST), shifting the offset by 1 hour during summer months. The exact dates vary by country.

• International business calls
• Travel planning
• Online meetings
• Broadcasting schedules
• Database timestamps

What is UTC? Coordinated Universal Time, the primary time standard by which the world regulates clocks and time.

How many time zones are there? 24 standard time zones, plus half-hour and half-quarter offsets, totaling about 38 zones.

Does every country have DST? No, many countries near the equator do not observe daylight saving time.

How do I know if DST applies? Check the date — DST typically runs from March to November in the Northern Hemisphere.

Can I calculate across multiple time zones? Convert step by step: source → UTC → target.

What about international date line? Crossing the date line adds or subtracts a full day from the time.