The timezone in Sri LankaTimezones are always computed by their difference to UTC, the "Universal Time Coordinated". In Sri Lanka exists only a single tonezone at UTC+5.5. E.g. New York is currently at UTC-5 in Eastern Time, so the time difference between NY and Sri Lanka is 11 hours.
Sri Lanka has no time difference between summer and winter. A daylight saving time doesn't exist.
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Only 1 nationwide time zone
|Standard time:||Myanmar Time (MMT)|
|Daylight saving time:||discontinued 1945|
Sri Lanka has an east-west extension of 2.0 degrees of longitude. Given the country's location in South Asia, this corresponds to about 230 kilometers. With such a small extent the course of the sun at different positions in the country hardly matters. The position of the sun in the west of the country deviates from that in the east only about 8 minutes. This means the sun rises and sets 8 minutes later in the west than in the east.
The Myanmar Time also applies in Burma.
No more daylight saving time in Sri LankaDue to the sun's orbit around the equator, the days are longer in summer (June to September in the northern hemisphere). Countries that switch to daylight saving time in the summer months align the daylight phase with the human rhythm. Unused bright morning hours are thus shifted into the evening (more information on daylight saving time here).
However, due to its proximity to the equator, the impact in Sri Lanka would not be particularly large. Colombo is located just 770 km from the equator. A day in midsummer would then not last from 05:55 to 18:29, but from 06:55 to 19:29. The effect would be quite noticeable in the evening, but the sun rising later in the morning falls at a time when many people are already awake. Thus, in 1945, the decision was made to finally abandon daylight saving time in Sri Lanka.