GMT to O Converter
Quick answers
GMT is 2 hours ahead of O. GMT uses GMT +0, and O uses GMT -2 for this comparison.
For example, 12:00 pm GMT is 10:00 am O. Use the converter above to adjust the date or time and create a shareable meeting link.
Best meeting overlap: 11am-5pm GMT, which is 9am-3pm O.
Compare GMT time with O time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Greenwich Mean Time is 2 hours ahead of Oscar Time Zone
12:00 pm12:00 in GMT is 10:00 am10:00 in O
GMT to O call time
Best time for a conference call or a meeting is between 11am-5pm in GMT which corresponds to 9am-3pm in O
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
10:00 am10:00 Oscar Time Zone (O). Offset UTC -2:00 hours
12:00 pm12:00 GMT / 10:00 am10:00 O
| GMT | O |
|---|---|
| 12am (midnight) | 10pm |
| 1am | 11pm |
| 2am | 12am (midnight) |
| 3am | 1am |
| 4am | 2am |
| 5am | 3am |
| 6am | 4am |
| 7am | 5am |
| 8am | 6am |
| 9am | 7am |
| 10am | 8am |
| 11am | 9am |
| 12pm (noon) | 10am |
| 1pm | 11am |
| 2pm | 12pm (noon) |
| 3pm | 1pm |
| 4pm | 2pm |
| 5pm | 3pm |
| 6pm | 4pm |
| 7pm | 5pm |
| 8pm | 6pm |
| 9pm | 7pm |
| 10pm | 8pm |
| 11pm | 9pm |
| 00:00 | 22:00 |
| 01:00 | 23:00 |
| 02:00 | 00:00 |
| 03:00 | 01:00 |
| 04:00 | 02:00 |
| 05:00 | 03:00 |
| 06:00 | 04:00 |
| 07:00 | 05:00 |
| 08:00 | 06:00 |
| 09:00 | 07:00 |
| 10:00 | 08:00 |
| 11:00 | 09:00 |
| 12:00 | 10:00 |
| 13:00 | 11:00 |
| 14:00 | 12:00 |
| 15:00 | 13:00 |
| 16:00 | 14:00 |
| 17:00 | 15:00 |
| 18:00 | 16:00 |
| 19:00 | 17:00 |
| 20:00 | 18:00 |
| 21:00 | 19:00 |
| 22:00 | 20:00 |
| 23:00 | 21:00 |
Greenwich Mean Time
Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe
Countries using this time zone: Burkina Faso, Côte d'Ivoire, Britain (UK), Guernsey, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Ireland, Isle of Man, Iceland, Jersey, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo
Principal Cities: The largest city in the GMT time zone is London in United Kingdom, with about 7.557 million people. Other major cities in this time zone include Abidjan, Dakar, Grand Dakar, Accra.
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.
GMT representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for GMT
- Z - short form of 'Zulu'
- Africa/Abidjan
- Africa/Accra
- Africa/Bamako
- Africa/Banjul
- Africa/Bissau
- Africa/Conakry
- Africa/Dakar
- Africa/Freetown
- Africa/Lome
- Africa/Monrovia
- Africa/Nouakchott
- Africa/Ouagadougou
- Africa/Sao_Tome
- Africa/Timbuktu
- America/Danmarkshavn
- Atlantic/Reykjavik
- Atlantic/St_Helena
- Eire
- Etc/GMT
- Etc/GMT+0
- Etc/GMT-0
- Etc/GMT0
- Etc/Greenwich
- Europe/Belfast
- Europe/Dublin
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- GMT
- GMT+0
- GMT-0
- GMT0
- Greenwich
- Iceland
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Universal Time Coordinated
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
Oscar Time Zone
Offset: O is 2 hours behind Greenwich Mean Time (GMT) and is used in Military
Daylight Saving: Clocks in Oscar Time Zone (O) do not change for daylight saving time, so O stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
O representations, usage and related time zones
- -02 - basic short
- -0200 - basic
- -02:00 - extended
- -0200 - sign character (-) followed by a four digit time providing hours (02) and minutes (00) of the offset. Indicates an offset of two hours to the west of the zero meridian.
- Oscar - Military abbreviation for O
- O - short form of 'Oscar'
- PMDT - Pierre & Miquelon Daylight Time
- WGT - West Greenland Time
- BRST - Brasilia Summer Time
- FNT - Fernando de Noronha Time
- O - Oscar Time Zone
- UYST - Uruguay Summer Time