London to Castelo do Piauí time converter

Castelo do Piauí is 4 hours behind London. When it is 9:00 AM in London, it is 5:00 AM in Castelo do Piauí.

London BST

Tuesday, October 20, 2026

Castelo do Piauí BRT

Monday, October 19, 2026

London
United Kingdom
Tue, Oct 20
BSTUTC+1
Castelo do Piauí
Piauí, Brazil
Mon, Oct 19
BRTUTC-3-4h
Finding your time zone…
Shared working hours (9:00–18:00)

London to Castelo do Piauí conversion table

Every hour of today in London and the matching time in Castelo do Piauí. Light rows are typical working hours (9:00–18:00).

LondonCastelo do Piauí
12:00 AM8:00 PM−1 day
1:00 AM9:00 PM−1 day
2:00 AM10:00 PM−1 day
3:00 AM11:00 PM−1 day
4:00 AM12:00 AM
5:00 AM1:00 AM
6:00 AM2:00 AM
7:00 AM3:00 AM
8:00 AM4:00 AM
9:00 AM5:00 AM
10:00 AM6:00 AM
11:00 AM7:00 AM
12:00 PM8:00 AM
1:00 PM9:00 AM
2:00 PM10:00 AM
3:00 PM11:00 AM
4:00 PM12:00 PM
5:00 PM1:00 PM
6:00 PM2:00 PM
7:00 PM3:00 PM
8:00 PM4:00 PM
9:00 PM5:00 PM
10:00 PM6:00 PM
11:00 PM7:00 PM

Best time to call or meet

Both sides are at work from 1:00 PM – 6:00 PM in London (9:00 AM – 2:00 PM in Castelo do Piauí).

Daylight saving time and the difference

The difference changes during the year because London and Castelo do Piauí switch clocks on different dates:

  • Oct 20, 2026 – Oct 25, 2026: -4h
  • Oct 25, 2026 – Mar 28, 2027: -3h
  • Mar 28, 2027 – Oct 20, 2027: -4h

Distance

London and Castelo do Piauí are 7,441 km (4,624 miles) apart in a straight line.

More conversions

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Questions and answers

What is the time difference between London and Castelo do Piauí?

Castelo do Piauí is 4 hours behind London.

What time is it in Castelo do Piauí when it is 9 AM in London?

When it is 9:00 AM in London, it is 5:00 AM in Castelo do Piauí.

When is the best time to call Castelo do Piauí from London?

Both sides are at work from 1:00 PM – 6:00 PM in London (9:00 AM – 2:00 PM in Castelo do Piauí).

Does the time difference between London and Castelo do Piauí change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.