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PT/PDT
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IST
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Quick answers

Selected conversion

5:00 am05:00 PDT (UTC-7), Oct 12, 2026 = 1:00 pm13:00 IST (UTC+1), Oct 12, 2026

PDT is 8 hours behind IST.

How the time difference changes

For most of the year, PT is 8 hours behind IST Europe. From Oct 25 to Nov 1, 2026, and from Mar 14 to Mar 28, 2027, PT is 7 hours behind GMT Europe. From Nov 1, 2026 to Mar 14, 2027, PT is 8 hours behind GMT Europe.

For most of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 5:00 pm to 1:00 am (next day) in IST Europe. At other times of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 5:00 pm to 1:00 am (next day) in GMT Europe or working hours of 9:00 am to 5:00 pm in PT correspond to 4:00 pm to 12:00 am (next day) in GMT Europe.For most of the year, working hours of 09:00 to 17:00 in PT correspond to 17:00 to 01:00 (next day) in IST Europe. At other times of the year, working hours of 09:00 to 17:00 in PT correspond to 17:00 to 01:00 (next day) in GMT Europe or working hours of 09:00 to 17:00 in PT correspond to 16:00 to 00:00 (next day) in GMT Europe.

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

Time Difference

Pacific Daylight Time is 8 hours behind Irish Standard Time.
5:00 am05:00 in PDT is 1:00 pm13:00 in IST

PDT to IST call time
Best time for a conference call or a meeting is between 8:30am-9:30am08:30-09:30 in PDT which corresponds to 4:30pm-5:30pm16:30-17:30 in IST. Their 9am–5pm09:00–17:00 working hours do not overlap; this is a suggested compromise.

5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
1:00 pm13:00 Irish Standard Time (IST). Offset UTC +1:00 hour

5:00 am05:00 PDT / 1:00 pm13:00 IST

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Hourly time comparison
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Pacific Time

Pacific Time (PT) is a general term used to describe the areas that observe either the Pacific Standard Time (PST) or Pacific Daylight Time (PDT) in the United States and Canada. PT also called Pacific Coast Time. PT is not static but switches between PDT and PST.

Territories observing the Pacific Time Zone are primarily in North America. It runs through the western part of Canada, the United States and the Northwestern part of Mexico.

Countries using this time zone: Canada, Mexico, United States.

Principal Cities: The largest city in the PT time zone is Los Angeles in the United States, with about 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.

French: HNP - Heure Normale du Pacifique

Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste

PT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -08 - basic short
  • -0800 - basic
  • -08:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Uniform - Military abbreviation for PT
  • U - short form of 'Uniform'
Time zones with the GMT -8 offset:
  • AKDT - Alaska Daylight Time
  • PST - Pacific Standard Time
  • PT - Pacific Time
  • PST - Pitcairn Standard Time
  • U - Uniform Time Zone

Irish Standard Time

Offset: IST is 1 hour ahead of Greenwich Mean Time (GMT).

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, Limerick, Galway, Waterford.

Map of the areas on Irish Standard Time (IST)
IST part of the year

Today all shaded areas are on IST.

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).

123456789101112Start: 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.

123456789101112End: 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