Vietnam is changing policy on holiday to have long weekends instead of scattering days off throughout the year. Most public holidays are to observe important historic events or celebrate New Year. Some holiday varies from year to year due to the time difference between Lunar and Solar calendar.  

Vietnam public holidays
January 1: New Year 
End of January or early February: Lunar New Year 
Early or mid April: Hung King Festival
April 30th: Reunification day 
May 1: Labour Day 
September 2: Independence Day   

Note: Some foreign offices and embassies may observe extra holiday according to the origin country.    

Business hours  
Many offices have Saturday and Sunday off while most workers at state-owned companies work on Saturday morning. Restaurants and stores generally do not have fixed opening hours. In cities stores tend to be open until later in the night. Internet cafes are allowed to open until 23 p.m. only and most shopping malls are closed at 9 p.m.    

Vietnam Public Holiday in 2011

Vietnam Public Holiday in 2012(**):  

(*) 2012 is a leap year.
(**) This serves as a tentative schedule only. The exact length of holiday will be announced by the Ministry of Labour, Invalid and Social Affairs in the due date.