The timezone ICT in VietnamTimezones are always computed by their difference to UTC, the "Universal Time Coordinated". In Vietnam there is only a single tonezone at UTC+7. For example, New York is currently at UTC-4 in Eastern Time, so the time difference between New York and Vietnam is 11 hours.
Vietnam has no time difference between summer and winter. A daylight saving time doesn't exist.
Back to overview: Vietnam
Current time in all regions of Vietnam:
Only 1 nationwide time zone
|Standard time:||Indochina Time (ICT)|
|Daylight saving time:||none|
Vietnam has an east-west extension of 6.3 degrees of longitude. Given the country's location in Southeast Asia, this corresponds to about 670 kilometers. With this still relatively small extension, the course of the sun is only slightly different at various positions in the country. The position of the sun in the west of the country differs from that in the east by only about 25 minutes. This means the sun rises and sets 25 minutes later in the west than in the east.
The Indochina Time also applies in Thailand, Cambodia and in Laos.
No daylight saving time in VietnamDue 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).
Due to the relative proximity to the equator, the impact in Vietnam is not particularly large. Hanoi is only 2,350 km from the equator. A day in midsummer would then not last from 05:14 to 18:42, but from 06:14 to 19:42. 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, daylight saving time was never introduced in Vietnam.