Two of Vietnam's seven holidays follow the lunar calendar and land on a different day every year — those are the ones travelers most often miss when planning around a Gregorian calendar. The other five are anchored to the same date annually, which makes them easy to build into a booking timeline in advance.

A public holiday in Vietnam doesn't pause the country evenly. Immigration counters, notary offices, and bank branches close in full — no counter service, no in-person document requests, no walk-in appeals. Hotels, restaurants, and tour operators generally keep running as normal, with one exception: during Tết, a large share of privately-run businesses close their doors for several days regardless of official status, so "open" on paper doesn't always mean staffed.