London to Tonga time converter

Tonga is 12 hours ahead of London. When it is 9:00 AM in London, it is 9:00 PM in Tonga.

London BST

Sunday, October 18, 2026

Tonga UTC+13

Monday, October 19, 2026

London
United Kingdom
Sun, Oct 18
BSTUTC+1
Tonga
Mon, Oct 19
UTC+13+12h
Finding your time zone…
Shared working hours (9:00–18:00)

London to Tonga conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 9:00 AM – 10:00 AM in London (9:00 PM – 10:00 PM in Tonga): working hours on one side, early or late on the other.

Daylight saving time and the difference

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

  • Oct 18, 2026 – Oct 25, 2026: +12h
  • Oct 25, 2026 – Mar 28, 2027: +13h
  • Mar 28, 2027 – Oct 18, 2027: +12h

More conversions

Tonga to LondonLondon to New YorkLondon to Los AngelesLondon to ChicagoLondon to TorontoLondon to São PauloLondon to ParisLondon to BerlinLondon to MoscowLondon to DubaiLondon to New DelhiLondon to BangkokLondon to Singapore
New York to TongaLos Angeles to TongaChicago to TongaToronto to TongaSão Paulo to TongaParis to TongaBerlin to TongaMoscow to TongaDubai to TongaNew Delhi to TongaBangkok to TongaSingapore to Tonga

Questions and answers

What is the time difference between London and Tonga?

Tonga is 12 hours ahead of London.

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

When it is 9:00 AM in London, it is 9:00 PM in Tonga.

When is the best time to call Tonga from London?

Working hours don't overlap fully. The closest fit is 9:00 AM – 10:00 AM in London (9:00 PM – 10:00 PM in Tonga): working hours on one side, early or late on the other.

Does the time difference between London and Tonga change?

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