Z to A Converter
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
12:00 pm12:00 Z (UTC+0), Nov 2, 2026 = 1:00 pm13:00 A (UTC+1), Nov 2, 2026
Z is 1 hour behind A.
Z and A examples
These examples always use Z (UTC+0) and A (UTC+1). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
Z is 1 hour behind A.
How the time difference changes
Z is 1 hour behind A year-round.
Working hours of 9:00 am to 6:00 pm in Z correspond to 10:00 am to 7:00 pm in A.Working hours of 09:00 to 18:00 in Z correspond to 10:00 to 19:00 in A.
Compare Z time with A time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Zulu Time Zone is 1 hour behind Alpha Time Zone.
12:00 pm12:00 in Z is 1:00 pm13:00 in A
Z to A call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in Z which corresponds to 10am-6pm10:00-18:00 in A
12:00 pm12:00 Zulu Time Zone (Z). Offset UTC 0:00 hours
1:00 pm13:00 Alpha Time Zone (A). Offset UTC +1:00 hour
12:00 pm12:00 Z / 1:00 pm13:00 A
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.
| Z | A |
|---|---|
| 1:00am | |
| 2:00am | |
| 3:00am | |
| 4:00am | |
| 5:00am | |
| 6:00am | |
| 7:00am | |
| 8:00am | |
| 9:00am | |
| 10:00am | |
| 11:00am | |
| 12:00pm | |
| 1:00pm | |
| 2:00pm | |
| 3:00pm | |
| 4:00pm | |
| 5:00pm | |
| 6:00pm | |
| 7:00pm | |
| 8:00pm | |
| 9:00pm | |
| 10:00pm | |
| 11:00pm | |
| 12:00am next day | |
| 01:00 | |
| 02:00 | |
| 03:00 | |
| 04:00 | |
| 05:00 | |
| 06:00 | |
| 07:00 | |
| 08:00 | |
| 09:00 | |
| 10:00 | |
| 11:00 | |
| 12:00 | |
| 13:00 | |
| 14:00 | |
| 15:00 | |
| 16:00 | |
| 17:00 | |
| 18:00 | |
| 19:00 | |
| 20:00 | |
| 21:00 | |
| 22:00 | |
| 23:00 | |
| 00:00 next day |
Zulu Time Zone
Offset: Z is the same as Greenwich Mean Time (GMT).
Countries using this time zone: Antarctica, Burkina Faso, Faroe Islands, Gambia, Ghana, Greenland, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Morocco, Portugal, Saint Helena, São Tomé and Príncipe, Senegal, Sierra Leone, Spain, Togo, United Kingdom, Western Sahara
Principal Cities: The largest city in the Z 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.
Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is the successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but UTC is the standard the scientific community uses.
UTC has been the time standard commonly used across the world since 1972. It is used in many technical fields, such as aviation and meteorology, and to synchronize time across internet networks.
Today some of the lighter areas are on UTC−1.
Z 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 Z
- Z - short form of 'Zulu'
- 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
Alpha Time Zone
Offset: A 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 A 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 Alpha Time Zone (A) keep the same time all year, while others use A for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.
Today some of the lighter areas are on UTC+0 (GMT, WET).
A 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 A
- 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