IST to London, United Kingdom to CET
Time Difference
India Standard Time is 4 hours and 30 minutes ahead of BST (British Summer Time) and 3 hours and 30 minutes ahead of Central European Summer Time
9:00 am09:00 in IST is 4:30 am04:30 in London, United Kingdom and is 5:30 am05:30 in CEST
IST to London 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 London
IST to CET 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 CET
9:00 am09:00 India Standard Time (IST). Offset UTC +5:30 hours
4:30 am04:30 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
5:30 am05:30 Central European Summer Time (CEST). Offset UTC +2:00 hours
9:00 am09:00 IST / 4:30 am04:30 London, United Kingdom / 5:30 am05:30 CEST
| IST | London, United Kingdom | CEST |
|---|---|---|
| 12am (midnight) | 7:30 pm | 8:30 pm |
| 1am | 8:30 pm | 9:30 pm |
| 2am | 9:30 pm | 10:30 pm |
| 3am | 10:30 pm | 11:30 pm |
| 4am | 11:30 pm | 12:30 am |
| 5am | 12:30 am | 1:30 am |
| 6am | 1:30 am | 2:30 am |
| 7am | 2:30 am | 3:30 am |
| 8am | 3:30 am | 4:30 am |
| 9am | 4:30 am | 5:30 am |
| 10am | 5:30 am | 6:30 am |
| 11am | 6:30 am | 7:30 am |
| 12pm (noon) | 7:30 am | 8:30 am |
| 1pm | 8:30 am | 9:30 am |
| 2pm | 9:30 am | 10:30 am |
| 3pm | 10:30 am | 11:30 am |
| 4pm | 11:30 am | 12:30 pm |
| 5pm | 12:30 pm | 1:30 pm |
| 6pm | 1:30 pm | 2:30 pm |
| 7pm | 2:30 pm | 3:30 pm |
| 8pm | 3:30 pm | 4:30 pm |
| 9pm | 4:30 pm | 5:30 pm |
| 10pm | 5:30 pm | 6:30 pm |
| 11pm | 6:30 pm | 7:30 pm |
| 0:00 | 19:30 | 20:30 |
| 1:00 | 20:30 | 21:30 |
| 2:00 | 21:30 | 22:30 |
| 3:00 | 22:30 | 23:30 |
| 4:00 | 23:30 | 0:30 |
| 5:00 | 0:30 | 1:30 |
| 6:00 | 1:30 | 2:30 |
| 7:00 | 2:30 | 3:30 |
| 8:00 | 3:30 | 4:30 |
| 9:00 | 4:30 | 5:30 |
| 10:00 | 5:30 | 6:30 |
| 11:00 | 6:30 | 7:30 |
| 12:00 | 7:30 | 8:30 |
| 13:00 | 8:30 | 9:30 |
| 14:00 | 9:30 | 10:30 |
| 15:00 | 10:30 | 11:30 |
| 16:00 | 11:30 | 12:30 |
| 17:00 | 12:30 | 13:30 |
| 18:00 | 13:30 | 14:30 |
| 19:00 | 14:30 | 15:30 |
| 20:00 | 15:30 | 16:30 |
| 21:00 | 16:30 | 17:30 |
| 22:00 | 17:30 | 18:30 |
| 23:00 | 18:30 | 19:30 |
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 representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +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.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
- Iran Standard Time - UTC +3:30
London Information
Time Zone
London Facts
Central European Time
Offset: CET is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe
Countries: It is used in following countries: Andorra, Albania, Austria, Bosnia & Herzegovina, Belgium, Switzerland, Czech Republic, Germany, Denmark, Algeria, Spain, France, Gibraltar, Croatia, Hungary, Italy, Liechtenstein, Luxembourg, Monaco, Montenegro, North Macedonia, Malta, Netherlands, Norway, Poland, Serbia, Sweden, Slovenia, Svalbard & Jan Mayen, Slovakia, San Marino, Tunisia, Vatican City
Principal Cities: The largest city in the CET timezone is Berlin from Germany with population about 3.426 million people. Other major cities in the area are Madrid, Rome, Paris, Algiers
German: MEZ - Mitteleuropäische Zeit
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Central European Summer Time (CEST).
End: Central European Time (CET) has ended on Sunday, March 30, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 30, 2025, 3:00 am local daylight time instead. Standard time ends annually the on last Sunday of March.
Start: Central European Time (CET) starts on Sunday, October 26, 2025 at 3:00 am local time and clocks are set one hour back to Sunday, October 26, 2025, 2:00 am. Standard time starts annually the on last Sunday of October.
CET 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 one hour and zero minutes time differences to the east of the zero meridian.
- Alpha - Military abbreviation for CET
- A - short form of 'Alpha'
- Africa/Algiers
- Africa/Ceuta
- Africa/Tunis
- Arctic/Longyearbyen
- Atlantic/Jan_Mayen
- CET
- Europe/Amsterdam
- Europe/Andorra
- Europe/Belgrade
- Europe/Berlin
- Europe/Bratislava
- Europe/Brussels
- Europe/Budapest
- Europe/Busingen
- Europe/Copenhagen
- Europe/Gibraltar
- Europe/Ljubljana
- Europe/Luxembourg
- Europe/Madrid
- Europe/Malta
- Europe/Monaco
- Europe/Oslo
- Europe/Paris
- Europe/Podgorica
- Europe/Prague
- Europe/Rome
- Europe/San_Marino
- Europe/Sarajevo
- Europe/Skopje
- Europe/Stockholm
- Europe/Tirane
- Europe/Vaduz
- Europe/Vatican
- Europe/Vienna
- Europe/Warsaw
- Europe/Zagreb
- Europe/Zurich
- MET
- Poland
- 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