Convert lunar calendar information by the GPS location you choose. Unlike a national-time-zone lunar calendar, this tool evaluates the new moon moment in actual local time.
Choose date, time, and map location to view lunar date, leap month, Can Chi year, and Four Pillars by local elemental timing.
Notes for local lunar time:
- New moon: The exact moment of Sun-Moon-Earth alignment.
- Lunar date: The day containing the new moon is lunar day 1.
- Leap month: Lunar months can be 29 or 30 days.
- Can Chi year: Based on the Start of Spring solar term.
- Four Pillars: Year, month, day, and hour pillars by local timing.
Why local lunar time matters?
Traditional lunar calendars use a national time zone, but the actual new moon date can differ by longitude and local time zone.
What is the new moon moment?
The new moon moment is the exact time when the Sun, Moon, and Earth align, with the Moon between the Sun and Earth.
At this moment the dark side of the Moon faces Earth, so the Moon is usually not visible.
Role in the lunar calendar
First lunar day rule
The local day containing the new moon moment is counted as day 1 of that lunar month.
Month length
The interval between two new moons is about 29.53 days, producing 30-day full months or 29-day short months.
Local calendar offset
Because the new moon is an absolute UTC moment, converting it to local time zones can produce different dates:
| Country | Time zone | Result (example: new moon at 23:30) |
| Vietnam | UTC+7 | Day 1 is Dec 31 |
| China | UTC+8 | Day 1 is Jan 1 (next day) |
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