Live offset · Year-round DST · Shareable URL

Time difference
London and Colombo

Live clocks (GMT ↔ IST), the current gap, month-by-month offset changes, and a full 24-hour map from London to Colombo.

1

Live gap

See the current offset between London and Colombo, with IANA-backed clocks updating every second.

2

Year-round chart

DST can shift the gap by an hour twice a year—the 2026 month table shows every change.

3

Hour-by-hour

Scroll the 24-hour table to map any civil hour in London into Colombo with day-shift cues.

Time difference workspace

How London and Colombo line up today.

2 cities · live offsetGap shifts yearly
City pair

London Colombo

Colombo is 4.5h ahead of London at this moment. Compare live clocks, seasonal DST shifts, and hour-by-hour conversions below.

Live offsetIANA zones · updates automatically
London
Europe/London
ZoneGMT / BST
Offset nowUTC+1
Hour gap
+4:30

ColomboLondon

Colombo
Asia/Colombo
ZoneIST
Offset nowUTC+5:30
About this pairUseful when planning calls or docs

Time difference between London and Colombo: Colombo is currently 5.5 hours ahead of London.

This difference is not constant: in winter London is 5.5 hours behind Colombo, while in summer (when one or both observe DST) the gap shifts to 4.5 hours behind. The monthly table below shows the exact offset gap month by month. For practical scheduling, jump to the best-time-to-meet page or the 24-hour conversion table below.

Jump aheadPick the view you need next
Best time to meetMonthly offsets24-hour table
Live clocks workspace

Clocks side by side.

Updates every second
Right nowEurope/London · Asia/Colombo
London
Europe/London
Live time
--:--
OffsetUTC+1
AbbreviationGMT / BST
Observes DST
Colombo
Asia/Colombo
Live time
--:--
OffsetUTC+5:30
AbbreviationIST
No DST
Relationship

Colombo is 4.5h ahead of London.

DST rules can widen or shrink this gap for a few weeks each spring and autumn—the month table below shows how many hours Colombo sits ahead of or behind London through the calendar year.

Next stepsPlan overlap or convert zones
Best time to meet →GMT → IST →Overlap Finder →
Year-round

Offset changes by month

Sampled mid-month for 2026. Compares Colombo versus London; a value of +3h means Colombo is three hours ahead of London.

2026 calendar

Month-by-month gap

MonthDifference (Colombo vs London)
January+5.5h
February+5.5h
March+5.5h
April+4.5h
May+4.5h
June+4.5h
July+4.5h
August+4.5h
September+4.5h
October+4.5h
November+5.5h
December+5.5h
Hour by hour

24-hour conversion table

Every civil hour in London mapped into Colombo; day-shift cues follow active DST for both zones today.

LondonColombo

Hourly wall-clock map for today — midnight crossings show as day shifts.

London with part-of-day icon
Colombo arrow and converted time
Day
  • 00:00
    04:30
    Same day
  • 01:00
    05:30
    Same day
  • 02:00
    06:30
    Same day
  • 03:00
    07:30
    Same day
  • 04:00
    08:30
    Same day
  • 05:00
    09:30
    Same day
  • 06:00
    10:30
    Same day
  • 07:00
    11:30
    Same day
  • 08:00
    12:30
    Same day
  • 09:00
    13:30
    Same day
  • 10:00
    14:30
    Same day
  • 11:00
    15:30
    Same day
  • 12:00
    16:30
    Same day
  • 13:00
    17:30
    Same day
  • 14:00
    18:30
    Same day
  • 15:00
    19:30
    Same day
  • 16:00
    20:30
    Same day
  • 17:00
    21:30
    Same day
  • 18:00
    22:30
    Same day
  • 19:00
    23:30
    Same day
  • 20:00
    00:30
    Next day
  • 21:00
    01:30
    Next day
  • 22:00
    02:30
    Next day
  • 23:00
    03:30
    Next day
Uses your browser's IANA zone data — choose another date in the converter for historical or future days.
Keep exploring

Related pages

More time-difference routes, pairwise best times, triple-city overlaps, and conversions tied to London, Colombo, or this corridor.

FAQ

Frequently asked questions

Offsets between London and Colombo, DST shifts, scheduling, and how we source timezone data—plus how to share this page.

Currently, Colombo is 4.5h ahead of London. This may change through the year if either city observes Daylight Saving Time.