Many people wonder why their age appears different on a lunar calendar compared to a solar calendar. The answer lies in how each calendar measures a year. In this guide, you'll learn the difference between lunar and solar calendar age, why official documents use the Gregorian calendar, and how an age calculator provides accurate results.
Solar Calendars
A solar calendar, like the Gregorian calendar, is based on Earth's orbit around the sun. A year is roughly 365.25 days long, with an extra leap day added every four years to keep the calendar aligned with the seasons.
Lunar Calendars
A lunar calendar is based on the phases of the moon. A lunar year is typically around 354 days — about 10 to 11 days shorter than a solar year. That's why lunar dates appear to shift "earlier" each year relative to the solar calendar.
The Effect on Age
Because a lunar year is shorter, a person's age counted in lunar years comes out numerically higher than their solar-calendar age — roughly one extra lunar year accumulates for every 33 solar years.
AgeMaster Calculator currently calculates using the Gregorian calendar, the system used most widely around the world — the standard for school, government, and official purposes.