+01:00 to GMT Converter
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1:00 pm13:00 +01:00 (UTC+1), Oct 31, 2026 = 12:00 pm12:00 GMT (UTC+0), Oct 31, 2026
+01:00 is 1 hour ahead of GMT.
+01:00 and GMT examples
These examples always use +01:00 (UTC+1) and GMT (UTC+0). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
+01:00 is 1 hour ahead of GMT.
How the time difference changes
+01:00 is 1 hour ahead of GMT year-round.
Working hours of 9:00 am to 6:00 pm in +01:00 correspond to 8:00 am to 5:00 pm in GMT.Working hours of 09:00 to 18:00 in +01:00 correspond to 08:00 to 17:00 in GMT.
Compare +01:00 time with GMT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
+01:00 GMT is 1 hour ahead of Greenwich Mean Time.
1:00 pm13:00 in +01:00 is 12:00 pm12:00 in GMT
+01:00 to GMT call time
Best time for a conference call or a meeting is between 10am-6pm10:00-18:00 in +01:00 which corresponds to 9am-5pm09:00-17:00 in GMT
1:00 pm13:00 +01:00 GMT (+01:00). Offset UTC +1:00 hour
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
1:00 pm13:00 +01:00 / 12:00 pm12:00 GMT
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| +01:00 | GMT |
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| 11:00pm previous day | |
| 12:00am | |
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| 23:00 previous day | |
| 00:00 | |
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+01:00 GMT
Offset: +01:00 is 1 hour ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Albania, Algeria, Andorra, Angola, Austria, Belgium, Benin, Bosnia and Herzegovina, Cameroon, Central African Republic, Chad, Croatia, Czechia, Democratic Republic of the Congo, Denmark, Equatorial Guinea, Faroe Islands, France, Gabon, Germany, Gibraltar, Guernsey, Hungary, Ireland, Isle of Man, Italy, Jersey, Kosovo, Liechtenstein, Luxembourg, Malta, Monaco, Montenegro, Netherlands, Niger, Nigeria, North Macedonia, Norway, Poland, Portugal, Republic of the Congo, San Marino, Serbia, Slovakia, Slovenia, Spain, Svalbard and Jan Mayen, Sweden, Switzerland, Tunisia, United Kingdom, Vatican City
Principal Cities: The largest city in the +01:00 time zone is Kinshasa in the Democratic Republic of the Congo, with about 16 million people. Other major cities in this time zone include Lagos, London, Kano, Ibadan.
Daylight Saving: Some places on +01:00 GMT (+01:00) keep the same time all year, while others use +01:00 for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.
+01:00 representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
- Alpha - Military abbreviation for +01:00
- A - short form of 'Alpha'
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time
Greenwich Mean Time
Offset: GMT is the same as Greenwich Mean Time (GMT).
Countries using this time zone: Antarctica, Burkina Faso, Gambia, Ghana, Greenland, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Morocco, Saint Helena, São Tomé and Príncipe, Senegal, Sierra Leone, Togo, United Kingdom, Western Sahara
Principal Cities: The largest city in the GMT time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Casablanca, Dakar.
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 the two are the same. In the military, GMT is known as Zulu time. Greenwich Mean Time was the same as Universal Time (UT), a standard astronomical concept used in many technical fields, until the introduction of UTC in 1972.
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 - Coordinated Universal Time
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
