As we are based in the UK, I have regular Skype updates with our volunteers in Vietnam, so figuring out a time to call them is 'easy as' once you have the time zones figured out.  

The standard time zone for Vietnam is UTC/GMT +7 hours & does not utilise daylight saving time. 
Time zone abbreviation is ICT (Indochina Time)

The best website which we use to keep in touch with our volunteers as well as the orphanages we support is timeanddate.com which also contains great information such as; up to date date 48 hr & weekly weather forecasts, Sun & Moon times as well the International dialling code (+84)!

Time/General

http://www.timeanddate.com/worldclock/city.html?n=218

Time Zone Converter

http://www.timeanddate.com/worldclock/converter.html

We certainly hope this information will also make it easier for you & your loved ones to keep in touch whilst you are in Vietnam! 


PS. you can buy the 'Cool Vietnam Wall Clock' at Cafe Press! 
http://www.cafepress.com