Time Zone Converter
Convert any time between world time zones instantly. All US zones, Europe, Asia, and Oceania. Handles daylight saving automatically.
Converted Time
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📐 How Time Zone Conversion Works
Every time zone is defined by its UTC offset — the number of hours ahead or behind Coordinated Universal Time (UTC). To convert: (1) Find the UTC equivalent of your source time by subtracting the source offset. (2) Add the destination offset. Daylight Saving Time shifts many zones by +1 hour from March to November in the Northern Hemisphere.
US Time Zones Explained
The continental US spans four time zones. Eastern Time (ET) is UTC-5 in winter (EST) and UTC-4 in summer (EDT) — used by New York, Miami, Atlanta, and Washington D.C. Central Time (CT) is one hour behind Eastern — Chicago, Houston, Dallas. Mountain Time (MT) is UTC-7 in winter — Denver, Phoenix (which doesn't observe daylight saving). Pacific Time (PT) is UTC-8 in winter — Los Angeles, Seattle, Las Vegas.
When Does Daylight Saving Time Change?
In the United States, Daylight Saving Time begins on the second Sunday in March (clocks spring forward 1 hour at 2:00 AM) and ends on the first Sunday in November (clocks fall back 1 hour at 2:00 AM). Arizona (except Navajo Nation) and Hawaii do not observe DST. This converter uses your browser's built-in timezone database, so DST is handled automatically for every date you enter.
Scheduling International Meetings Across Time Zones
The best overlap window for US East Coast and Western Europe is 9:00 AM–12:00 PM EST (3:00–6:00 PM CET). For US West Coast and India, there is virtually no standard-hours overlap — 9:00 AM PST is 10:30 PM IST. The converter above shows exactly what any given time looks like in multiple key cities simultaneously.
Frequently Asked Questions
EST (UTC-5) is: CST+1hr, MST+2hr, PST+3hr, London (GMT) at EST+5, Paris/Berlin (CET) at EST+6, Dubai (GST) at EST+9, India (IST) at EST+10:30, Tokyo (JST) at EST+14, Sydney (AEDT) at EST+16 in summer.
The continental US has 4: Eastern, Central, Mountain, and Pacific. Adding Alaska (UTC-9) and Hawaii (UTC-10) makes 6. US territories extend this further — Puerto Rico uses AST (UTC-4), Guam uses ChST (UTC+10).
Yes. This tool uses your browser's built-in IANA timezone database (the same database used by your operating system), so daylight saving adjustments are automatic for every date — past, present, or future.
UTC (Coordinated Universal Time) is the global time standard. Every time zone is expressed as UTC+ or UTC- an offset. UTC never changes for daylight saving. Servers, aviation, and international finance all use UTC to avoid ambiguity across zones.