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Time Zones • Live Reference Chart

Time Zone Chart

Compare world time zones by current UTC offset, abbreviation, local time and representative IANA zone. The chart is date-aware, so seasonal clock changes are reflected instead of treating every time zone as a fixed offset.

A time zone is more than a UTC offset. The offset tells you how far a clock is from UTC now. An IANA time zone represents the civil-time rules that determine which offset applies on a particular date.
Reference basisUTC offsetsSorted and calculated live
Rule systemIANA zonesDate-aware civil time
IncludesFractional offsets30- and 45-minute systems
View World Chart U.S. Chart UTC Offset Chart

World Time Zone Chart

A live reference table for commonly used civil time zones around the world. Current abbreviation, UTC offset, local time and seasonal status are calculated for today's date in your browser.

Browse World Time Zones →

Live chart loading…

Time ZoneCurrent AbbreviationCurrent UTC OffsetLocal TimeDST / SeasonalIANA Example
Eastern TimeUnited States & Canada——Live—America/New_York
Central TimeUnited States & Canada——Live—America/Chicago
Mountain TimeUnited States & Canada——Live—America/Denver
ArizonaUnited States——Live—America/Phoenix
Pacific TimeUnited States & Canada——Live—America/Los_Angeles
Alaska TimeUnited States——Live—America/Anchorage
Hawaii TimeUnited States——Live—Pacific/Honolulu
Atlantic TimeCanada / Atlantic——Live—America/Halifax
Newfoundland TimeCanada——Live—America/St_Johns
Brasília TimeBrazil——Live—America/Sao_Paulo
UTCGlobal reference——Live—UTC
United KingdomUnited Kingdom——Live—Europe/London
Central European TimeEurope——Live—Europe/Paris
Eastern European TimeEurope——Live—Europe/Athens
Ireland TimeIreland——Live—Europe/Dublin
Israel TimeIsrael——Live—Asia/Jerusalem
South Africa Standard TimeSouth Africa——Live—Africa/Johannesburg
Egypt TimeEgypt——Live—Africa/Cairo
Gulf Standard TimeUnited Arab Emirates——Live—Asia/Dubai
Iran TimeIran——Live—Asia/Tehran
Afghanistan TimeAfghanistan——Live—Asia/Kabul
India Standard TimeIndia——Live—Asia/Kolkata
Nepal TimeNepal——Live—Asia/Kathmandu
Bangladesh Standard TimeBangladesh——Live—Asia/Dhaka
Myanmar TimeMyanmar——Live—Asia/Yangon
Indochina TimeThailand / Vietnam——Live—Asia/Bangkok
China Standard TimeChina——Live—Asia/Shanghai
Japan Standard TimeJapan——Live—Asia/Tokyo
Australian Central TimeAustralia——Live—Australia/Adelaide
Australian Eastern TimeAustralia——Live—Australia/Sydney
Lord Howe TimeAustralia——Live—Australia/Lord_Howe
New Zealand TimeNew Zealand——Live—Pacific/Auckland
Chatham Islands TimeNew Zealand——Live—Pacific/Chatham
Marquesas TimeFrench Polynesia——Live—Pacific/Marquesas
Line Islands TimeKiribati——Live—Pacific/Kiritimati

A representative IANA identifier is shown for each row. Large umbrella zones can contain multiple IANA identifiers with different local histories or exceptions.

U.S. Time Zone Chart

Compare the major U.S. time-zone families by standard and daylight abbreviations. Current values are shown separately because daylight saving rules can change the active abbreviation and UTC offset.

All U.S. time zones by state →
U.S. Time ZoneStandard TimeStandard UTCDaylight TimeDaylight UTCCurrent
Eastern TimeESTUTC−05:00EDTUTC−04:00—
Central TimeCSTUTC−06:00CDTUTC−05:00—
Mountain TimeMSTUTC−07:00MDTUTC−06:00—
Pacific TimePSTUTC−08:00PDTUTC−07:00—
Alaska TimeAKSTUTC−09:00AKDTUTC−08:00—
Hawaii TimeHSTUTC−10:00———
Most of ArizonaMSTUTC−07:00———
Browse All 50 States DST by State U.S. Time Zone Map
Live UTC Reference

Current UTC Offset Chart

The offset chart groups IANA time zones by the UTC offset they use right now. Because seasonal rules can move a zone from one offset to another, this list is calculated for the current date rather than frozen as a permanent table.

Explore UTC Offsets UTC Time Now GMT Time Now GMT vs UTC
UTC NowLive timeCoordinated Universal Time
Current Unique OffsetsCalculating…From browser-supported IANA zones
UTC OffsetExample IANA ZoneCurrent Time
Calculating current offset groups…

Half-Hour & 45-Minute Time Zones

Not every civil time zone uses a whole-hour difference from UTC. Fractional offsets are important when converting times, scheduling meetings and interpreting an offset chart.

UTC−03:30

Newfoundland

Newfoundland uses a half-hour offset during standard time, with a seasonal daylight offset when applicable.

UTC+04:30

Afghanistan

Afghanistan Time uses a 30-minute offset from the neighboring whole-hour UTC references.

UTC+05:30

India

India Standard Time uses UTC+05:30 year-round and does not use a seasonal daylight change.

UTC+05:45

Nepal

Nepal Time uses a 45-minute offset, one of the clearest examples of why a world chart needs more than whole hours.

UTC+09:30

Central Australia

Adelaide and nearby areas use a half-hour base offset, with a seasonal daylight change in participating jurisdictions.

UTC+12:45

Chatham Islands

The Chatham Islands use a 45-minute base offset and a seasonal daylight form when in effect.

Standard Time vs Daylight Time

A named time-zone family can use different abbreviations and UTC offsets during the year. The umbrella name stays useful even while the active seasonal form changes.

Eastern Time (ET)EST is UTC−05:00 during standard time; EDT is UTC−04:00 during daylight time.
Central Time (CT)CST is UTC−06:00 during standard time; CDT is UTC−05:00 during daylight time.
Pacific Time (PT)PST is UTC−08:00 during standard time; PDT is UTC−07:00 during daylight time.
Daylight Saving Time Guide

How to Read the Time Zone Chart

Current abbreviation shows the short label in effect now for the representative IANA zone. Current UTC offset shows the present numerical difference from UTC. Local time is the live clock in that zone. DST / seasonal indicates whether the zone changes offset during the current year. The IANA example is a software-friendly ruleset identifier, not a claim that every place in the umbrella zone uses exactly the same identifier.

Lookup

Need a quick reference?

Use the chart to compare names, offsets, abbreviations and representative IANA zones at a glance.

Convert

Need a specific clock time?

Use the converter when you need to transform a date and time from one location or zone into another.

Map

Need geographic boundaries?

Use the Time Zone Map when the location of a boundary matters more than the table reference.

Related Time Zone Tools

Move from reference lookup to conversion, detection, comparison or geographic exploration without losing the time-zone context.

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Time Zone Converter

Convert a specific date and time between zones and locations.

Convert time → ◎

What Time Zone Am I In?

Detect your device's IANA zone, current offset and seasonal status.

Detect my zone → ABC

Time Zone Abbreviations

Understand short codes, seasonal variants and ambiguous abbreviations.

Browse abbreviations → ±

UTC Offsets

Explore UTC− and UTC+ references with current examples.

View offsets → ◉

World Time Zones

Browse time-zone references by country, region and major location.

Explore world zones → ⌖

Time Zone Map

Switch from table lookup to a geographic view of time-zone boundaries.

Open the map →

Sources & Methodology

CalendarHours treats civil time as date-aware. Live values are calculated from IANA-compatible time-zone data exposed by the browser rather than hardcoded as permanent offsets.

Primary rulesIANA Time Zone Database
U.S. referenceNIST time & DST guidance
Browser renderingIntl.DateTimeFormat
Chart behaviorDate-aware current offsets
IANA Time Zone Database NIST — Daylight Saving Time MDN — Intl.DateTimeFormat

Last reviewed: August 19, 2026. Government rule changes can alter future civil-time behavior, so date-aware zone data should be used instead of assuming a permanent offset.

Time Zone Chart FAQ

Answers to common questions about offsets, abbreviations, IANA zones and seasonal changes.

What is a time zone chart?

A time zone chart is a reference table that compares civil time zones using information such as the current UTC offset, local time, abbreviation and a representative IANA time-zone identifier. A live chart is date-aware, so seasonal offset changes can be reflected instead of assuming one fixed offset all year.

Why can the same time zone have two abbreviations?

Some civil time zones use one abbreviation during standard time and another during daylight saving time. Eastern Time in much of the United States, for example, uses EST during standard time and EDT during daylight time.

Is a UTC offset the same as a time zone?

No. A UTC offset is only the numerical difference from Coordinated Universal Time at a particular moment. An IANA time zone also represents location-based civil-time rules and transitions.

Why are there half-hour and 45-minute time zones?

Civil time zones are set by governments and do not have to differ from UTC by whole hours. India uses a half-hour offset, Nepal uses a 45-minute offset, and several other locations use fractional offsets.

What does an IANA time zone mean?

An IANA identifier such as America/New_York or Asia/Kolkata is a software-friendly name for a civil time-zone ruleset. It helps systems apply the correct historical, current and future offset rules for a location.

Why does the current UTC offset change during the year?

Where daylight saving or another seasonal rule is used, the civil time zone can switch between offsets on scheduled dates. That is why CalendarHours calculates current offsets from date-aware time-zone data instead of hardcoding a single value.

What is the difference between a time zone chart and a time zone map?

A time zone chart is designed for table-based lookup and comparison. A time zone map is designed to show geographic boundaries and where zones are used.

How can I convert a specific time between zones?

Use the Time Zone Converter when you need to convert a specific date and clock time. The chart is optimized for reference and lookup rather than one-off conversions.