GMT to SLST
Convert London Time — GMT/BST to Sri Lanka Time — Colombo — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in London, it's 1:30 PM in Colombo. Colombo is 4½ hours ahead of London. Use the converter above to turn any GMT time into SLST, or scan the hour-by-hour table below for the full day.
GMT to SLST at a glance
Planning a meeting between London and Colombo
Planning a call between London and Colombo? The best overlap during a standard 9-to-5 workday runs 9:00 AM–12:30 PM GMT (1:30 PM–5:00 PM SLST). Aim for that window to reach both sides during business hours.
Hour-by-hour: London to Colombo
A full day mapped from GMT to SLST.
Frequently asked
Is Colombo ahead of or behind London?
Colombo is 4½ hours ahead of London.
What is 12:00 PM GMT in SLST?
12:00 PM in London is 4:30 PM in Colombo.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so GMT and SLST automatically reflect the correct daylight-saving offset for the current date.