by Eric » Sat Mar 01, 2014 3:27 pm
By law, Immigration Office issue 1 month visa (or visa approval letter), 3 months, ... There is no "under 1 month visa".
But at Vietnam airport, the Immigration Officers issue visa that valid from the day traveler enter Vietnam till the last day in the approval letter so there is "under 1 month visa".
For example: You want stay in Vietnam from 25 April to 15 May and you apply visa for that period. Immigration Office will issue a visa approval letter from 25 April to 25 May (by law). If you travel as planned (arrive on 25 April), the Officers at airport will issue a visa from 25 April to 25 May (1 month visa). If you (for some reasons) arrive late (say, 29 April), the Officers will issue a visa from 29 April to 25 May (total time is under 1 month).
Total days of a month is varied from 28 to 31 days so if you want to get "under 1 month visa" you'd better stay 27 days.