Colombo is 5 hours 30 minutes behind Australia. When it's noon in Colombo, it's 16:00 in Australia.
Colombo runs on Asia/Colombo; Australia runs on Australia/Sydney. Together they are 4.5 hours 30 minutes apart.
Working hours overlap
Both Colombo and Australia are simultaneously in business hours for 3.5 hours per day (assuming standard 9:00–17:00 working hours).
00:0006:0012:0018:0024:00
Colombo
Australia
Overlap (3.5h)
Best call times between these locations
There is a 3.5-hour daily window where both locations are in business hours. The 3 best slots are listed below.
09:00 Colombo / 13:00 Sydney✓ Both working
10:00 Colombo / 14:00 Sydney✓ Both working
11:00 Colombo / 15:00 Sydney✓ Both working
Working hours defined as 09:00–17:00 local time for each location.
Public holidays this year
Colombo
No upcoming public holidays this year.
Australia6 holidays
Sep 28King's Birthday
Oct 5Labour Day
Oct 5King's Birthday
Nov 3Melbourne Cup
Dec 25Christmas Day
Colombo and Australia — practical scheduling
Colombo (Sri Lanka) and Australia (Australia) are 4.5 hours apart. With a 3.5-hour daily overlap in standard business hours, both teams can connect in real time without either side stretching beyond their normal workday.
💡 Practical scheduling guidelines
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If you are in Colombo, aim for 09:00–10:00, which corresponds to 13:00–14:00 in Australia — both teams are within working hours.
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If you are in Colombo, aim for 10:00–11:00, which corresponds to 14:00–15:00 in Australia — both teams are within working hours.
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If you are in Colombo, aim for 11:00–12:00, which corresponds to 15:00–16:00 in Australia — both teams are within working hours.
Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.
Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am Colombo".
