How to Use the Lunar to Solar Date Converter
Many Asian and Asian-American families track anniversaries, birthdays, and holidays by the lunar calendar, which shifts against the Gregorian calendar every year — making it easy to lose track of the matching solar date. This tool uses standard lunar calendar data to convert lunar dates to solar dates, and solar dates back to lunar, instantly. Pick a direction, enter the year, month, and day, and the result includes the day of the week.
To keep the lunar calendar aligned with the seasons, a leap month is inserted roughly once every 2-3 years. To convert a leap-month date, check the "This is a leap month" box — if that year's selected month isn't actually a leap month, you'll see an error. Supported years run from 1900 through 2100; anything outside that range returns an error message.
This converter is a reference tool built on standard lunar calendar data. For situations where precision really matters — legal filings, religious observances — double-check against an authoritative astronomical source as well.
Frequently Asked Questions
Turn on the leap month checkbox in Lunar-to-Solar mode and calculate. If that year's selected month has no actual leap month, you'll see an error message. Leap months are inserted roughly once every 2-3 years.
It converts lunar and solar dates for any year from 1900 through 2100. Entering a year outside this range will show an error message.