Convert a Lunar Birthday to the Solar Calendar — Calculate 60th, 70th, and 80th Birthday Dates
Jun 21, 2026
When a parent's birthday follows the lunar calendar, it is hard to track which solar date it lands on each year, and easy to forget altogether. On top of that, big milestone celebrations like the 60th, 70th, and 80th birthday need their dates known in advance so you can prepare. This guide explains how to convert a lunar birthday to the solar calendar and calculate longevity-celebration dates as well.
Enter a lunar date of birth and get this year's solar birthday plus the 60th, 70th, and 80th birthday dates all at once.
Lunar birthday & milestone calculator →Longevity celebrations — milestones by age
- 60th birthday (hwangap / hoegap) — age 60, the year the birth zodiac cycle comes full circle.
- 70th birthday (chilsun / gohui) — age 70.
- 80th birthday (palsun) — age 80, and 90th birthday (gusun) — age 90.
Traditionally these were counted by Korean "counting age," but today celebrations are often held by international (full) age. The calculator shows both at once.
How to calculate — 1 step
- Enter your parent's lunar date of birth (including whether it is a leap month) into the lunar birthday calculator, and it instantly returns this year's solar birthday along with the solar dates of the 60th, 70th, and 80th birthdays.
For example, for someone born on the 24th day of the 4th lunar month in 1960, you can check this year's solar birthday and when the 60th birthday fell, all at once.
When to use it
- Adding a parent's or grandparent's solar birthday to a calendar or phone.
- Preparing a 60th, 70th, or 80th birthday celebration in advance.
- Converting lunar dates like memorial-service or anniversary dates to the solar calendar.
Tools that pair well
For general lunar↔solar conversion, use the lunar–solar converter; for an exact age, the age calculator; and to see how many days remain until the celebration, the date calculator / D-day.
Lunar birthday → solar date + 60th, 70th, 80th birthdays. Free.
Lunar birthday & milestone calculator →Frequently asked questions
Q. Does it handle leap-month birthdays?
Yes. You can specify whether it is a leap month, so leap-month birthdays convert accurately to the solar calendar.
Q. Is the 60th birthday at age 60 or 61?
The hwangap marks the year the birth zodiac cycle returns, usually celebrated at age 60. The calculator shows the corresponding solar year directly.
Q. Is my information stored?
No. Everything is calculated in your browser and nothing is transmitted or stored.