Date and time notation in Vietnam

Date and time notation in Vietnam describes methods of expressing date and time used in Vietnam.

Date and time notation in Vietnam[]
Full date5 tháng 2 2021
All-numeric date05/02/2021
05-02-2021
05.02.2021
Time17:04

Date

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:

Time

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:

Time span Example Notes
Nửa đêm/Đêm
(Midnight/Night)		 00:00 to 00:59 12 giờ đêm
Sáng
(Morning)		 01:00 (sometimes from 00:00) to 10:59 7 giờ sáng Also abbreviated as "SA" in computer systems (e.g. Windows) to denote "a.m."
Trưa
(Noon)		 11:00 to 12:59 or 13:59 12 giờ trưa
Chiều
(Afternoon)		 13:00 or 14:00 to 17:59 2 giờ chiều Also abbreviated as "CH" in computer systems (e.g. Windows) to denote "p.m."
Tối
(Evening/night)		 18:00 to 21:59 or 22:29 7 giờ tối
Đêm
(Night)		 22:00 or 22:30 to 23:59 11 giờ đêm

References
  1. "A technical view of FVI: End-to-end Vietnamese ID card OCR".
  2. "DateTime::Locale::vi_VN - Locale data examples for the Vietnamese Vietnam (vi-VN) locale".
  3. "Lịch phát sóng (UTC+07:00)".

See also
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