Updating current time…
AZOST
Azores Summer Time
GMT +0
12am
3am
6am
9am
12pm
3pm
6pm
9pm
IST
Irish Standard Time
GMT +1
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

12:00 pm12:00 AZOST (UTC+0), Oct 5, 2026 = 1:00 pm13:00 IST (UTC+1), Oct 5, 2026

AZOST is 1 hour behind IST.

AZOST and IST examples

These examples always use AZOST (UTC+0) and IST (UTC+1). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

AZOST is 1 hour behind IST.

How the time difference changes

For most of the year, AZOST is 1 hour behind IST Europe. At other times of the year, AZOT is 1 hour behind GMT Europe.

For most of the year, working hours of 9:00 am to 5:00 pm in AZOST correspond to 10:00 am to 6:00 pm in IST Europe. At other times of the year, working hours of 9:00 am to 5:00 pm in AZOT correspond to 10:00 am to 6:00 pm in GMT Europe.For most of the year, working hours of 09:00 to 17:00 in AZOST correspond to 10:00 to 18:00 in IST Europe. At other times of the year, working hours of 09:00 to 17:00 in AZOT correspond to 10:00 to 18:00 in GMT Europe.

Compare AZOST time with IST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Azores Summer Time is 1 hour behind Irish Standard Time.
12:00 pm12:00 in AZOST is 1:00 pm13:00 in IST

AZOST to IST call time
Best time for a conference call or a meeting is between 9am-4pm09:00-16:00 in AZOST which corresponds to 10am-5pm10:00-17:00 in IST

12:00 pm12:00 Azores Summer Time (AZOST). Offset UTC 0:00 hours
1:00 pm13:00 Irish Standard Time (IST). Offset UTC +1:00 hour

12:00 pm12:00 AZOST / 1:00 pm13:00 IST

AZOSTIST
12:00am1:00am
1:00am2:00am
2:00am3:00am
3:00am4:00am
4:00am5:00am
5:00am6:00am
6:00am7:00am
7:00am8:00am
8:00am9:00am
9:00am10:00am
10:00am11:00am
11:00am12:00pm
12:00pm1:00pm
1:00pm2:00pm
2:00pm3:00pm
3:00pm4:00pm
4:00pm5:00pm
5:00pm6:00pm
6:00pm7:00pm
7:00pm8:00pm
8:00pm9:00pm
9:00pm10:00pm
10:00pm11:00pm
11:00pm12:00am
00:0001:00
01:0002:00
02:0003:00
03:0004:00
04:0005:00
05:0006:00
06:0007:00
07:0008:00
08:0009:00
09:0010:00
10:0011:00
11:0012:00
12:0013:00
13:0014:00
14:0015:00
15:0016:00
16:0017:00
17:0018:00
18:0019:00
19:0020:00
20:0021:00
21:0022:00
22:0023:00
23:0000:00

Azores Summer Time

Offset: AZOST is 0 hours ahead Greenwich Mean Time (GMT) and is used in Atlantic

Countries using this time zone: Portugal

Principal Cities: The largest city in the AZOST time zone is Ponta Delgada in Portugal, with about 20,056 people.

AZOST Time Zone Geo Map
AZOST timezone map

Daylight Saving: Azores Summer Time (AZOST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Azores Time (AZOT).

Daylight saving time clock moves forward for one hourStart: Azores Summer Time (AZOST) started on Sunday, March 29, 2026 at 12:00 am00:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 1:00 am01:00. Daylight saving starts annually on the last Sunday of March.

Daylight saving time clock moves back for one hourEnd: Azores Summer Time (AZOST) ends on Sunday, October 25, 2026 at 1:00 am01:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 12:00 am00:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.

See upcoming clock changes worldwide.

AZOST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for AZOST
  • Z - short form of 'Zulu'
Time zones with the GMT +0 offset:
  • 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

Irish Standard Time

Offset: IST is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe

Countries using this time zone: Ireland

Principal Cities: The largest city in the IST time zone is Dublin in Ireland, with about 1.024 million people. Other major cities in this time zone include Cork, Luimneach, Gaillimh, Dun Laoghaire.

IST Time Zone Geo Map
IST timezone map

Daylight Saving: Irish Standard Time (IST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Greenwich Mean Time (GMT).

Daylight saving time clock moves forward for one hourStart: Irish Standard Time (IST) started on Sunday, March 29, 2026 at 1:00 am01:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 2:00 am02:00. Daylight saving starts annually on the last Sunday of March.

Daylight saving time clock moves back for one hourEnd: Irish Standard Time (IST) ends on Sunday, October 25, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.

See upcoming clock changes worldwide.

IST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +01 - basic short
  • +0100 - basic
  • +01:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +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.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Alpha - Military abbreviation for IST
  • A - short form of 'Alpha'
IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Eire
  • Europe/Dublin
IST Abbreviation: Several time zones share IST abbreviation and it could refer to these time zones
  • India Standard Time - UTC +5:30
  • Irish Standard Time - UTC +1
  • Israel Standard Time - UTC +2
Time zones with the GMT +1 offset:
  • 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