Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

CEST to BST

-1h

CEST

CESTSOURCE

UTC+02:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

BST

UTC+01:00☀ DST active

HH11

MM00

11:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

CEST

BST

12:00 AM

11:00 PM-1

2:00 AM

1:00 AM

4:00 AM

3:00 AM

6:00 AM

5:00 AM

8:00 AM

7:00 AM

10:00 AM

9:00 AM

12:00 PM

11:00 AM

2:00 PM

1:00 PM

4:00 PM

3:00 PM

6:00 PM

5:00 PM

8:00 PM

7:00 PM

10:00 PM

9:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

CEST and BST on the World Map

The map below highlights the CEST (Central European Summer Time) and BST (British Summer Time) timezone regions across the globe.

CEST Zone

→

BST Zone

Explore all world timezones interactively →

CEST – Central European Summer Time

UTC+02:00

Central European Summer Time (CEST) is the daylight saving time in Central Europe, 2 hours ahead of UTC.

Countries in CEST

GermanyFranceItalySpainNetherlandsBelgiumAustriaSwitzerlandPolandSwedenNorway

Major Cities in CEST

ParisBerlinRomeMadridAmsterdamViennaStockholm

Key Facts about CEST

•CEST runs from the last Sunday of March to the last Sunday of October.
•The EU has voted to abolish clock changes but implementation has been delayed.
•CEST shares the same offset as EET (UTC+02:00).

Daylight Saving:Yes – switches to CET

Learn more about CEST on Wikipedia

BST – British Summer Time

UTC+01:00

British Summer Time (BST, UTC+01:00) is the daylight saving period in the United Kingdom, running from late March to late October.

Countries in BST

United Kingdom

Major Cities in BST

LondonBirminghamManchesterGlasgowEdinburghCardiffBelfastLiverpoolBristolLeeds

Key Facts about BST

•BST runs from the last Sunday in March to the last Sunday in October.
•BST is exactly one hour ahead of GMT, the UK's standard time.
•During BST, London is 4 hours ahead of New York while the US is on Eastern Daylight Time.
•The Isle of Man and the Channel Islands also observe BST.

Daylight Saving:Yes – switches to BST

Learn more about BST on Wikipedia

Time Conversion Guide: CEST to BST

CEST runs on Central European Summer Time (CEST) at UTC+02:00. BST runs on British Summer Time (BST) at UTC+01:00. That puts CEST 1 hour behind BST — a difference of -1h at the current offsets.

In practice, when it is 9:00 AM in CEST it is 8:00 AM in BST. Midnight in CEST is 11:00 PM in BST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

CEST to BST time conversion table

CEST (CEST)	BST (BST)	Day
12:00 AM	11:00 PM	previous day
6:00 AM	5:00 AM	same day
7:00 AM	6:00 AM	same day
8:00 AM	7:00 AM	same day
9:00 AM	8:00 AM	same day
12:00 PM	11:00 AM	same day
3:00 PM	2:00 PM	same day
5:00 PM	4:00 PM	same day
6:00 PM	5:00 PM	same day
9:00 PM	8:00 PM	same day

Why people convert CEST to BST time

Scheduling a call from CEST to BST: a 10:00 AM start in CEST lands at 9:00 AM in BST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both CEST and BST are inside the 9-to-5 working day between 10:00 AM and 5:00 PM CEST time (9:00 AM–4:00 PM BST). That is roughly 7 hours of usable overlap.
Coordinating a CEST-based team with BST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM CEST" is unambiguous; "3 PM" across a -1h gap is not.
Block 10:00 AM–5:00 PM CEST as the recurring meeting window if you work primarily from CEST and need BST colleagues present.

About CEST (Central European Summer Time)

Central European Summer Time (CEST) is observed from the last Sunday of March to the last Sunday of October across most of Europe. During CEST, clocks are 2 hours ahead of UTC. The EU has debated abolishing seasonal clock changes since 2019.

About BST (British Summer Time)

British Summer Time (BST) is the daylight saving period in the United Kingdom, when clocks move one hour forward from Greenwich Mean Time (GMT, UTC+00:00) to UTC+01:00. It runs from the last Sunday in March to the last Sunday in October. England, Scotland, Wales and Northern Ireland all follow it, along with the Isle of Man and the Channel Islands of Jersey and Guernsey. During BST, London is one hour ahead of UTC, four hours ahead of New York on Eastern Daylight Time, and five hours ahead of New York once the United States returns to Eastern Standard Time in November. BST is also used to abbreviate Bangladesh Standard Time (UTC+06:00), which is listed separately on this site.

Best time to call between CEST and BST

Both CEST and BST sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM CEST, which is 9:00 AM–4:00 PM BST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

CEST and BST share 7 hours of working-hours overlap (10:00 AM–5:00 PM CEST), so scheduling a live meeting is straightforward.

CEST is 1 hour behind BST (CEST UTC+02:00 → BST UTC+01:00). The shared working window is 10:00 AM–5:00 PM CEST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

CEST

☀ Currently in DST

Standard: UTC+01:00 · DST: UTC+02:00

Clocks fall back on Sun, Oct 25, 2026

BST

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 2026

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between CEST and BST?

CEST (CEST, UTC+02:00) is 1 hour behind BST (BST, UTC+01:00). The gap is currently -1h.

How do I convert CEST time to BST time?

Add -1h to CEST local time. For example, 9:00 AM in CEST is 8:00 AM in BST.

What time is it in BST right now?

BST uses BST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from CEST.