Vietnamese lunar ↔ solar date converter
Tết, death anniversaries (giỗ), the full-moon offerings on the 1st and 15th, and many birthdays of older Vietnamese relatives all follow the lunar calendar, so the solar date moves every year. Convert either way, leap months included, and see what kind of day the result is.
What kind of day is Wednesday, 14 October 2026?
Oct 2026
Good for
- Important events in general (it is an auspicious day)
- Building dykes and embankments
- Filling in holes and ditches
- Putting things into storage
Best avoided
- Starting medical treatment
- Opening a business
- Setting out on a journey
Close day: Bad for everything except building dykes and filling in holes.
Hours of the day
The day is split into twelve two-hour periods, each named after a zodiac animal. Green ones are the auspicious (“hoàng đạo”) hours, Vietnam time.
People born in 1975, 1987, 1999, 2011, 2023 usually keep big events off this day.
Check this date for your birth year, and see the next two weeks →
How this works
- Months follow the moon. Each lunar month starts on the day of the new moon and has 29 or 30 days. The 15th is the full moon.
- Leap months. Twelve lunar months fall about eleven days short of a solar year, so roughly every three years a 13th month is added. It repeats the month before it and is called a leap month (tháng nhuận) — tick the box if the date you have is in one.
- Vietnam time. New moons are calculated for UTC+7. That is why Vietnam and China occasionally celebrate Tết on different days.
- Lunar years. The lunar year starts at Tết, in late January or February. A birthday in early January usually belongs to the previous lunar year and zodiac sign.
The conversion is astronomical and reliable from 1200 to 2199. The day reading is a cultural reference; day-selection schools differ in the details.