Vietnam time zone is GMT +7 and thus has the same hours as Thailand and Indonesia. Vietnam day and night contrast with those in North America (for example, AM in Vietnam will be PM in the US and vice versa). Vietnam does not have daylight saving time so the hours are fixed in winter and summer.
Below is a table to compare the time and hours between selected countries and Vietnam.
| Hanoi, Ho Chi Minh City, Bangkok, Jakarta (GMT +7) | 00:00 | 2:00 | 6:00 | 10:00 | 12:00 | 14:00 | 16:00 | 18:00 | 20:00 | 22:00 |
| Chicago, Houston (GMT -6) | 11:00* | 13:00* | 17:00* | 21:00* | 23:00* | 1:00 | 3:00 | 5:00 | 7:00 | 9:00 |
| Hong Kong, Kuala Lumpur, Singapore (GMT +8) | 1:00 | 3:00 | 7:00 | 11:00 | 13:00 | 15:00 | 17:00 | 19:00 | 21:00 | 23:00 |
| London, Madrid (GMT +0) | 17:00* | 19:00* | 23:00* | 3:00 | 5:00 | 7:00 | 9:00 | 11:00 | 13:00 | 15:00 |
| Melbourne, Sydney (GMT +11) | 4:00 | 6:00 | 10:00 | 14:00 | 16:00 | 18:00 | 20:00 | 22:00 | 00:00 | 2:00 |
| Moscow (GMT +4) | 21:00* | 23:00* | 3:00 | 7:00 | 9:00 | 11:00 | 13:00 | 15:00 | 17:00 | 19:00 |
| New Delhi, Calcutta (GMT +6) | 23:00* | 1:00 | 6:00 | 9:00 | 11:00 | 13:00 | 15:00 | 17:00 | 19:00 | 21:00 |
| New York, Toronto, Montreal, Bogota (GMT -5) | 12:00* | 14:00* | 18:00* | 22:00* | 00:00 | 2:00 | 4:00 | 6:00 | 8:00 | 10:00 |
| Paris, Rome, Amsterdam, Hamburgh (GMT +1) | 18:00* | 20:00* | 00:00 | 4:00 | 6:00 | 8:00 | 10:00 | 12:00 | 14:00 | 16:00 |
| San Francisco, Vancouver, Seatle (GMT -8) | 9:00* | 11:00* | 15:00* | 19:00* | 21:00* | 23:00* | 1:00 | 3:00 | 5:00 | 7:00 |
| Sao Paulo, Rio de Janeiro (GMT -2) | 15:00* | 17:00* | 21:00* | 1:00 | 3:00 | 5:00 | 7:00 | 9:00 | 11:00 | 13:00 |
| South Korea, Japan (GMT +9) | 2:00 | 4:00 | 8:00 | 12:00 | 14:00 | 16:00 | 18:00 | 20:00 | 22:00 | 00:00 |