Colombo vs Japan — time difference
Colombo is 4 hours 30 minutes behind Japan. At noon in Colombo, your contact in Japan sees 15:00.
Colombo observes Asia/Colombo and Japan observes Asia/Tokyo — a 3.5 hours 30 minutes gap between them.
Shared working hours
Colombo and Japan share 4.5 hours of overlapping business hours daily — enough for real-time collaboration without anyone joining at odd hours.
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Meeting time recommendations
Colombo and Japan share 4.5 hours of business hours overlap daily. Showing the 3 most balanced slots — see the time table below for the full window.
09:00 Colombo / 12:00 Tokyo✓ Both working
10:00 Colombo / 13:00 Tokyo✓ Both working
11:00 Colombo / 14:00 Tokyo✓ Both working
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Public holidays for both locations
Colombo
No upcoming public holidays this year.
Japan5 holidays
Sep 21Respect for the Aged Day
Sep 23Autumnal Equinox Day
Oct 12Sports Day
Nov 3Culture Day
Nov 23Labour Thanksgiving Day
Scheduling between Colombo and Japan
Teams in Colombo (Sri Lanka) and Japan (Japan) face a 3.5-hour time difference day to day. A 4.5-hour shared business hours window makes real-time meetings feasible for both sides within their normal working day.
💡 Scheduling tips for these locations
✅Schedule at 09:00–10:00 (Colombo) for a 12:00–13:00 slot in Japan — the sweet spot where both teams are working.
✅Schedule at 10:00–11:00 (Colombo) for a 13:00–14:00 slot in Japan — the sweet spot where both teams are working.
✅Schedule at 11:00–12:00 (Colombo) for a 14:00–15:00 slot in Japan — the sweet spot where both teams are working.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Install ClockinSync Free →Drag the slider at the top to convert any Colombo time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
