IST
India Standard Time
GMT +5:30
WEST
Western European Summer Time
GMT +1
WEST is NOT in use by many locations
WET (Western European Time) is used instead. Switch to WET time zone or select one of the cities Lisbon, Las Palmas de Gran Canaria, Porto) for automatic timezone change.

Time Difference

India Standard Time is 4 hours and 30 minutes ahead of Western European Summer Time
6:30 am06:30 in IST is 2:00 am02:00 in WEST

IST to WEST call time
Best time for a conference call or a meeting is between 12:30pm-6pm in IST which corresponds to 8am-1:30pm in WEST

6:30 am06:30 India Standard Time (IST). Offset UTC +5:30 hours
2:00 am02:00 Western European Summer Time (WEST). Offset UTC +1:00 hour

6:30 am06:30 IST / 2:00 am02:00 WEST

IST WEST
12am (midnight) 7:30 pm
1am 8:30 pm
2am 9:30 pm
3am 10:30 pm
4am 11:30 pm
5am 12:30 am
6am 1:30 am
7am 2:30 am
8am 3:30 am
9am 4:30 am
10am 5:30 am
11am 6:30 am
12pm (noon) 7:30 am
1pm 8:30 am
2pm 9:30 am
3pm 10:30 am
4pm 11:30 am
5pm 12:30 pm
6pm 1:30 pm
7pm 2:30 pm
8pm 3:30 pm
9pm 4:30 pm
10pm 5:30 pm
11pm 6:30 pm
0:00 19:30
1:00 20:30
2:00 21:30
3:00 22:30
4:00 23:30
5:00 0:30
6:00 1:30
7:00 2:30
8:00 3:30
9:00 4:30
10:00 5:30
11:00 6:30
12:00 7:30
13:00 8:30
14:00 9:30
15:00 10:30
16:00 11:30
17:00 12:30
18:00 13:30
19:00 14:30
20:00 15:30
21:00 16:30
22:00 17:30
23:00 18:30

India Standard Time

Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: India

Principal Cities: The largest city in the IST timezone is Mumbai from India with population about 12.692 million people. Other major cities in the area are Delhi, Bangalore, Kolkata, Chennai

Daylight Saving: India Standard Time (IST) is not adjusted for daylight saving therefore IST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, India Standard Time remains the same

IST Time Zone Geo Map
IST timezone map

IST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0530 - basic
  • +05:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates five hour and thirty minutes time differences to the east of the zero meridian.
IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Calcutta
  • Asia/Kolkata
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
  • Iran Standard Time - UTC +3:30

Western European Summer Time

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

Countries: It is used in following countries: Spain, Faroe Islands, Portugal

Principal Cities: The largest city in the WEST timezone is Lisbon from Portugal with population about 517,802 people. Other major cities in the area are Las Palmas de Gran Canaria, Porto, Santa Cruz de Tenerife, Amadora

German: WESZ - Westeuropäische Sommerzeit

WEST Time Zone Geo Map
WEST timezone map

Daylight Saving: Western European Summer Time (WEST) is a daylight saving/summer time zone, however during winter some places adjust time for one hour back and observe Western European Time (WET).

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Western European Summer Time (WEST) has ended on Sunday, October 30, 2022 at 2:00 am local time and clocks were set one hour back to Sunday, October 30, 2022, 1:00 am local standard time instead. Daylight saving ends annually the on last Sunday of October

Daylight saving time clock moves forward for one hour from 1am to 2amStart: Western European Summer Time (WEST) starts on Sunday, March 26, 2023 at 1:00 am local time and clocks are set one hour forward to Sunday, March 26, 2023, 2:00 am. Daylight saving starts annually the on last Sunday of March

WEST 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 one hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Alpha - Military abbreviation for WEST
  • A - short form of 'Alpha'
IANA/Olson: Reflects WEST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Atlantic/Canary
  • Atlantic/Faeroe
  • Atlantic/Faroe
  • Atlantic/Madeira
  • Europe/Lisbon
  • Portugal
  • WET
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