Free tool · Vietnamese lunar calendar
Vietnamese lunar calendar today and solar-to-lunar conversion
Convert a Gregorian date to the Vietnamese lunisolar calendar (UTC+7). Results are calculated in your browser without sending the selected date to a server.
Convert a Gregorian date
Today (Vietnam time)
Method: approximate Meeus astronomy and lunar-month/leap-month rules. Years 1900–2100; verify edge dates independently.
How does the Vietnamese lunar calendar work?
The start of each lunar month follows the new moon. Leap months follow solar longitude rules. Different civil time zones can sometimes cause Vietnamese and Chinese lunar dates to differ.
This tool uses an astronomical approximation with several checked dates from 2023–2027. Dates near a new moon close to midnight should be confirmed with authoritative astronomical calendars.
What does the mobile app add?
Qelunai provides a month calendar, new/full moon reminders, family memorial dates and home-screen widgets. The app is currently available to invited testers.
Common questions
Which time zone is used?
Vietnam civil time, UTC+7, rather than the Chinese UTC+8 calendar.
Is sign-in required?
No. Your selected date stays in the browser.