Date and time notation in Vietnam

In Vietnam, dates follow the "day month year" order. All-numeric dates can be written as:[1]

• d/m/yyyy (9/1/2021)
• d-m-yyyy (9-1-2021)
• dd/mm/yyyy (09/01/2021)
• dd-mm-yyyy (09-01-2021)

A dot in the line (period or full stop) can also be used (i.e. 9.1.2021, 09.01.2021).

In the full form, the month name is alphanumeric. Example: "9 tháng 1 năm 2021". Leading zeros may also be used: "09 tháng 01 năm 2021".

Monday is the first day of the week and Sunday is the last day of the week.[2]

The names of months and days are as follows:

Vietnam uses the 24-hour notations in writing; an "h" or ":" is used as separator, e.g. "13h15" or "13:15". Full hours can be written just with an "h", e.g. "6h" (not "6h00" or "06h00"). Transport timetables use it exclusively, as do legal documents and television schedules.[3] It can also be used orally (e.g. the time 00:05 would be read as Không giờ năm phút ("zero hour, five minutes")).

The 12-hour notations is also used orally but instead of AM/PM, it's necessary to specify the place of the sun:

• Date format by country