Offset
UTC+02:00 means local clock time is two hours ahead of UTC at that moment. It does not tell you the place or daylight-saving rule.
UTC offsets and time zone abbreviations
A practical reference for reading offsets like UTC+05:30, checking the current time at each offset, and spotting ambiguous abbreviations like CST, IST, BST, and EST.
The short version
Time zone
Europe/Paris is a real zone identifier. It can be UTC+01:00 in winter and UTC+02:00 in summer.
Abbreviation
CST is a label people use, but it can mean several different offsets. Treat it as display text, not a reliable identifier.
UTC offset table
Search by offset, city, country, or note. Use the table to compare fixed UTC offsets and see example places that commonly use them.
| Offset | Current time | Example places | Notes |
|---|---|---|---|
| UTC-12:00 | Loading... | Baker Island, Howland Island | Uninhabited US islands. Useful mostly as a boundary case for date calculations. |
| UTC-11:00 | Loading... | American Samoa, Niue, Midway Atoll | One of the last inhabited offsets to enter a new calendar day. |
| UTC-10:00 | Loading... | Honolulu, Tahiti, Cook Islands | Hawaii does not use daylight saving time. |
| UTC-09:30 | Loading... | Marquesas Islands | A rare 30-minute negative offset. |
| UTC-09:00 | Loading... | Anchorage standard time, Gambier Islands | Alaska is UTC-09:00 in standard time and UTC-08:00 in daylight time. |
| UTC-08:00 | Loading... | Los Angeles standard time, Vancouver standard time, Pitcairn Islands | Pacific Time is UTC-08:00 in standard time and UTC-07:00 in daylight time. |
| UTC-07:00 | Loading... | Denver standard time, Phoenix, Yukon | Arizona mostly stays here year-round, while many Mountain Time locations move to UTC-06:00 in daylight time. |
| UTC-06:00 | Loading... | Chicago standard time, Mexico City standard time, Guatemala | Central Time locations that observe daylight saving often move to UTC-05:00. |
| UTC-05:00 | Loading... | New York standard time, Lima, Bogota, Jamaica | Eastern Time is UTC-05:00 in standard time and UTC-04:00 in daylight time. |
| UTC-04:00 | Loading... | Santiago standard time, Caracas, La Paz, Atlantic daylight time | This offset can mean standard time in one place and daylight time in another. |
| UTC-03:30 | Loading... | Newfoundland standard time | Newfoundland is the best-known North American half-hour offset. |
| UTC-03:00 | Loading... | Sao Paulo, Buenos Aires, Montevideo, Atlantic daylight time | Common across eastern South America and parts of the Atlantic. |
| UTC-02:00 | Loading... | South Georgia, Fernando de Noronha | A small-population offset used by Atlantic islands. |
| UTC-01:00 | Loading... | Azores standard time, Cape Verde | Azores moves to UTC+00:00 during daylight time. |
| UTC+00:00 | Loading... | UTC, London standard time, Reykjavik, Accra, Lisbon standard time | UTC is the reference scale; local civil zones may still have daylight rules. |
| UTC+01:00 | Loading... | Paris standard time, Lagos, London daylight time, Dublin summer time | CET in winter and British/Irish summer time both land here. |
| UTC+02:00 | Loading... | Athens standard time, Cairo, Johannesburg, Central European daylight time | Can be standard time in Africa and Eastern Europe, or daylight time in Central Europe. |
| UTC+03:00 | Loading... | Moscow, Istanbul, Riyadh, East Africa Time | Many places here do not currently change clocks seasonally. |
| UTC+03:30 | Loading... | Tehran standard time | Iran uses a half-hour base offset. |
| UTC+04:00 | Loading... | Dubai, Baku, Mauritius, Samara | Gulf Standard Time is UTC+04:00, but GST is not globally unique. |
| UTC+04:30 | Loading... | Kabul | Afghanistan uses a 30-minute offset. |
| UTC+05:00 | Loading... | Karachi, Tashkent, Maldives | Pakistan Standard Time is commonly written PKT to avoid PST ambiguity. |
| UTC+05:30 | Loading... | India, Sri Lanka | India Standard Time is one of the most widely used half-hour offsets. |
| UTC+05:45 | Loading... | Kathmandu, Nepal | Nepal is one of the best-known 45-minute offsets. |
| UTC+06:00 | Loading... | Dhaka, Almaty, Bhutan | Bangladesh Standard Time is BST, which conflicts with other meanings of BST. |
| UTC+06:30 | Loading... | Myanmar, Cocos Islands | A 30-minute offset used in Myanmar and the Cocos Islands. |
| UTC+07:00 | Loading... | Bangkok, Jakarta, Ho Chi Minh City, Phnom Penh | Common across mainland Southeast Asia and western Indonesia. |
| UTC+08:00 | Loading... | Beijing, Singapore, Manila, Perth, Kuala Lumpur | China uses one national civil time even though the country spans several solar-time regions. |
| UTC+08:45 | Loading... | Eucla, Western Australia | A rare 45-minute offset used in a small part of Australia. |
| UTC+09:00 | Loading... | Tokyo, Seoul, Pyongyang, Palau | Japan and Korea do not currently use daylight saving time. |
| UTC+09:30 | Loading... | Adelaide standard time, Darwin | Central Australia uses this half-hour offset; some locations move to UTC+10:30 in daylight time. |
| UTC+10:00 | Loading... | Sydney standard time, Brisbane, Guam, Port Moresby | Eastern Australia is split: some places observe daylight time and others do not. |
| UTC+10:30 | Loading... | Lord Howe Island standard time, Adelaide daylight time | Lord Howe has a distinctive 30-minute daylight shift. |
| UTC+11:00 | Loading... | Solomon Islands, Vanuatu, New Caledonia, Sydney daylight time | Can be permanent standard time in the Pacific or daylight time in southeastern Australia. |
| UTC+12:00 | Loading... | Auckland standard time, Fiji standard time, Marshall Islands | New Zealand moves to UTC+13:00 during daylight time. |
| UTC+12:45 | Loading... | Chatham Islands standard time | A rare 45-minute offset used by the Chatham Islands. |
| UTC+13:00 | Loading... | Auckland daylight time, Samoa, Tonga, Phoenix Islands | Among the first inhabited offsets to enter a new calendar day. |
| UTC+14:00 | Loading... | Kiritimati, Line Islands | The farthest-ahead civil offset in regular use. |
No matching offsets found.
Ambiguous time zone abbreviations
Use this table when someone sends a meeting time with a short label. The safest answer is usually to ask for a city or IANA zone.
CST
3 common meanings Central Standard Time UTC-06:00 Central North America standard time
China Standard Time UTC+08:00 China year-round civil time
Cuba Standard Time UTC-05:00 Cuba standard time
CST is one of the most dangerous abbreviations because the possible answers are separated by 13 to 14 hours.
Safer: Use America/Chicago, Asia/Shanghai, or America/Havana.
IST
3 common meanings India Standard Time UTC+05:30 India and Sri Lanka in many contexts year-round civil time
Irish Standard Time UTC+01:00 Ireland summer time
Israel Standard Time UTC+02:00 Israel standard time
IST can point to South Asia, Ireland, or Israel, so a date and location are mandatory.
Safer: Use Asia/Kolkata, Europe/Dublin, or Asia/Jerusalem.
BST
3 common meanings British Summer Time UTC+01:00 United Kingdom summer time
Bangladesh Standard Time UTC+06:00 Bangladesh year-round civil time
Bougainville Standard Time UTC+11:00 Bougainville year-round civil time
BST changes meaning by region, and British Summer Time is not used in winter.
Safer: Use Europe/London, Asia/Dhaka, or Pacific/Bougainville.
EST
2 common meanings Eastern Standard Time UTC-05:00 Eastern North America and some Caribbean contexts standard time
Eastern Standard Time UTC+10:00 Australia in some informal or legacy contexts standard time
In North America, EST is not the same as EDT. In Australia, AEST is the safer abbreviation.
Safer: Use America/New_York, America/Toronto, Australia/Sydney, or Australia/Brisbane.
PST
3 common meanings Pacific Standard Time UTC-08:00 Pacific North America standard time
Philippine Standard Time UTC+08:00 Philippines year-round civil time
Pakistan Standard Time UTC+05:00 Pakistan often written PKT in technical contexts
PST can be a 13 to 16 hour mistake depending on which region the writer meant.
Safer: Use America/Los_Angeles, Asia/Manila, or Asia/Karachi.
MST
2 common meanings Mountain Standard Time UTC-07:00 Mountain North America standard time or year-round in parts of Arizona
Myanmar Standard Time UTC+06:30 Myanmar less common; MMT is often clearer
Mountain Time is especially tricky because some places observe daylight saving time and some do not.
Safer: Use America/Denver, America/Phoenix, or Asia/Yangon.
AST
2 common meanings Atlantic Standard Time UTC-04:00 Atlantic Canada and the Caribbean standard time or year-round in some places
Arabia Standard Time UTC+03:00 Saudi Arabia and nearby countries year-round civil time
AST is a seven-hour difference depending on whether the context is Atlantic or Arabia.
Safer: Use America/Halifax, America/Puerto_Rico, or Asia/Riyadh.
GST
2 common meanings Gulf Standard Time UTC+04:00 United Arab Emirates and Oman year-round civil time
South Georgia Time UTC-02:00 South Georgia and the South Sandwich Islands year-round civil time
GST is uncommon enough that many readers will guess incorrectly without a place name.
Safer: Use Asia/Dubai or Atlantic/South_Georgia.
CDT
3 common meanings Central Daylight Time UTC-05:00 Central North America daylight time
Cuba Daylight Time UTC-04:00 Cuba daylight time
Australian Central Daylight Time UTC+10:30 South Australia in daylight time usually written ACDT
The D usually means daylight time, so the date matters as much as the region.
Safer: Use America/Chicago, America/Havana, or Australia/Adelaide.
HST
usually clear Hawaii Standard Time UTC-10:00 Hawaii year-round civil time
HST is less ambiguous than CST or IST, but a city name is still better for software.
Safer: Use Pacific/Honolulu.
UTC
usually clear Coordinated Universal Time UTC+00:00 global reference scale always
UTC is a time standard, not a local civil time zone.
Safer: UTC is safe when you truly mean the zero offset reference time.
No matching abbreviations found.
How to read a UTC offset
UTC+05:30
Add 5 hours and 30 minutes to UTC. If it is 12:00 UTC, the fixed-offset clock reads 17:30.
UTC-04:00
Subtract 4 hours from UTC. If it is 12:00 UTC, the fixed-offset clock reads 08:00.
Z
In ISO 8601 timestamps, Z means zero offset from UTC, as in 2026-05-25T12:00:00Z.
A numeric offset is excellent for a single timestamp because it tells you exactly how that timestamp relates to UTC. It is weak for recurring future events because governments can change daylight-saving rules, and the offset for a city can change by season.
Half-hour and quarter-hour offsets
Not every civil offset is a whole number of hours. India uses UTC+05:30, Nepal uses UTC+05:45, Newfoundland uses UTC-03:30, and the Chatham Islands use UTC+12:45. These are not errors or rounding quirks; they are legal local-time rules.
This matters in spreadsheets, logs, and scheduling tools. Code that assumes offsets are always whole hours will be wrong for millions of people.
Rule of thumb
Store exact instants in UTC. Store future local events with a city-based IANA time zone. Display offsets and abbreviations as helpful labels, not as the source of truth.
Offset, abbreviation, IANA zone: which should you use?
Use case Best value Why
Log entry or database timestamp 2026-05-25T12:00:00Z or UTC epoch time It represents one exact instant and avoids local clock ambiguity.
Calendar event in a real place America/New_York, Europe/Madrid, Asia/Tokyo The zone carries daylight-saving and legal clock rules.
One-off timestamp from an external system ISO timestamp with numeric offset The offset is enough to recover the UTC instant for that timestamp.
User-facing label Localized name or abbreviation plus city People can scan it quickly, while the city prevents ambiguity.
When this page is not enough
This page is a reference for offsets and labels. It intentionally does not replace a date-aware converter. If you need to know whether Paris and New York are 5, 6, or 7 hours apart on a specific date, use the time zone converter. If you need a meeting time that works for several cities, use the meeting planner.
FAQ
Is a UTC offset the same thing as a time zone?
No. A UTC offset is only a numeric difference from UTC at a specific moment. A time zone, such as America/New_York or Europe/Paris, includes rules for daylight saving time and historical clock changes.
Why should I avoid time zone abbreviations in schedules?
Many abbreviations are shared by unrelated regions. CST can mean Central Standard Time in North America, China Standard Time, or Cuba Standard Time. Use a city-based IANA time zone when the event matters.
Are UTC and GMT the same?
For everyday civil-time offsets, UTC+00:00 and GMT+00:00 are usually treated as the same offset. Technically, UTC is the modern time standard used for timestamps and computing, while GMT is a historical and civil-time name.
Why do some offsets use 30 or 45 minutes?
Civil time is set by local law and history, not by a universal rule that requires whole hours. India, Nepal, Newfoundland, Myanmar, the Chatham Islands, and a few Australian regions use non-hour offsets.
Can I store only an offset for a recurring meeting?
Only if the meeting is intentionally fixed to that offset. For local civil time, store an IANA time zone and the local time. Otherwise daylight-saving changes can move the meeting by an hour for some participants.
Reference notes
This guide follows the practical model used by the IANA time zone database: location-based time zone identifiers are the stable input for civil time, while abbreviations are human-facing labels that can be ambiguous. Unicode CLDR also treats raw GMT/UTC offsets, location-based names, and metazone names as separate display patterns.