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Time & Date Tools

Timezone Converter

Enter a date and time, select your source timezone, and see the equivalent time across 22 major world timezones instantly.

By ToolHub Pro, Editorial Team·Updated 2026-06-01
Los Angeles (PT)—
Denver (MT)—
Chicago (CT)—
New York (ET)—
São Paulo (BRT)—
UTC—
London (GMT/BST)—
Paris (CET)—
Moscow (MSK)—
Dubai (GST)—
Mumbai/Delhi (IST)—
Dhaka (BST)—
Bangkok (ICT)—
Singapore (SGT)—
Beijing/Shanghai (CST)—
Tokyo (JST)—
Seoul (KST)—
Sydney (AEDT)—
Auckland (NZST)—
Lagos (WAT)—
Nairobi (EAT)—
Johannesburg (SAST)—

How Timezones Work

The world is divided into time zones defined as offsets from UTC(Coordinated Universal Time), the global time standard. UTC+0 is the baseline. New York is UTC−5 in winter (Eastern Standard Time) and UTC−4 in summer (Eastern Daylight Time). Tokyo is UTC+9 year-round. Japan does not observe daylight saving time. London is UTC+0 in winter (GMT) and UTC+1 in summer (BST).

Daylight Saving Time (DST) is the main source of confusion. The US, Canada, most of Europe, and parts of Australia shift their clocks forward by one hour in spring and back in autumn. but the exact dates differ. The US switches on the second Sunday in March; Europe switches on the last Sunday in March. This means there are two weeks each year when the difference between New York and London is 4 hours instead of the usual 5.

UTC Offsets for Major Cities

  • Los Angeles. UTC−8 (PST) / UTC−7 (PDT)
  • New York. UTC−5 (EST) / UTC−4 (EDT)
  • London. UTC+0 (GMT) / UTC+1 (BST)
  • Paris / Berlin. UTC+1 (CET) / UTC+2 (CEST)
  • Dubai. UTC+4 (no DST)
  • Mumbai. UTC+5:30 (no DST)
  • Singapore / Hong Kong. UTC+8 (no DST)
  • Tokyo. UTC+9 (no DST)
  • Sydney. UTC+10 (AEST) / UTC+11 (AEDT)

Example: a meeting set for 2:00 PM Eastern Time (EDT, UTC−4) in New York. London (BST, UTC+1) is 5 hours ahead: 7:00 PM. Singapore (UTC+8) is 12 hours ahead: 2:00 AM the next day.

The IANA Time Zone Database

Every computer, phone, and server uses the IANA Time Zone Database (also called tzdata or zoneinfo) to know the current UTC offset for any named timezone. It is maintained by IANA and updated whenever a country changes its DST rules or UTC offset . which happens more often than you might expect. Venezuela, for example, changed its offset in 2016. Morocco observes DST but suspends it during Ramadan. Keeping tzdata up to date on servers is a routine sysadmin task that prevents time-sensitive bugs.

Source: IANA Time Zone Database

Frequently Asked Questions

What is UTC and how does it relate to time zones?
UTC (Coordinated Universal Time) is the global time standard that all time zones are defined relative to. Time zones are expressed as UTC offsets — for example, Eastern Time is UTC−5 in winter (EST) and UTC−4 in summer (EDT). UTC itself does not change for daylight saving time.
Why do some time zones have half-hour or 45-minute offsets?
Most time zones are offset from UTC by whole hours, but some countries chose non-standard offsets for geographic or political reasons. India is UTC+5:30, Nepal is UTC+5:45, and Iran is UTC+3:30. These offsets were set to better align solar noon with local noon in those regions.
How does daylight saving time affect time zone conversions?
Many countries shift their clocks forward by one hour in spring and back in autumn, changing their UTC offset seasonally. The US switches between EST (UTC−5) and EDT (UTC−4). Not all countries observe DST, and transition dates differ by country — always check the specific date when converting times near transition weekends.
What time is best for scheduling international meetings?
Overlap of standard business hours (9am–5pm) between time zones determines the best meeting window. New York and London have roughly 4–5 hours of overlap. New York and Singapore (UTC+8) have almost no overlap during normal hours. Tools like the World Clock Meeting Planner help find times that work across multiple zones.

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