Guam to London time converter

London is 9 hours behind Guam. When it is 9:00 AM in Guam, it is 12:00 AM in London.

Guam ChST

Saturday, October 17, 2026

London BST

Friday, October 16, 2026

Guam
Sat, Oct 17
ChSTUTC+10
London
United Kingdom
Fri, Oct 16
BSTUTC+1-9h
Finding your time zone…
Shared working hours (9:00–18:00)

Guam to London conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 4:00 PM – 6:00 PM in Guam (7:00 AM – 9:00 AM in London): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Guam and London switch clocks on different dates:

  • Oct 17, 2026 – Oct 25, 2026: -9h
  • Oct 25, 2026 – Mar 28, 2027: -10h
  • Mar 28, 2027 – Oct 17, 2027: -9h

More conversions

London to GuamGuam to New YorkGuam to Los AngelesGuam to ChicagoGuam to TorontoGuam to São PauloGuam to ParisGuam to BerlinGuam to MoscowGuam to DubaiGuam to New DelhiGuam to BangkokGuam to Singapore
New York to LondonLos Angeles to LondonChicago to LondonToronto to LondonSão Paulo to LondonParis to LondonBerlin to LondonMoscow to LondonDubai to LondonNew Delhi to LondonBangkok to LondonSingapore to London

Questions and answers

What is the time difference between Guam and London?

London is 9 hours behind Guam.

What time is it in London when it is 9 AM in Guam?

When it is 9:00 AM in Guam, it is 12:00 AM in London.

When is the best time to call London from Guam?

Working hours don't overlap fully. The closest fit is 4:00 PM – 6:00 PM in Guam (7:00 AM – 9:00 AM in London): working hours on one side, early or late on the other.

Does the time difference between Guam and London change?

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