My Birthday Moon

The Moon from that day, here for you now.

Sat, May 31, 2025

Waxing Crescent

A slender beginning of light. This Moon was there at your beginning, too.

Time has passed. The shape of that day’s Moon can still be found.

Phase and illumination use noon in Korea (KST) on the selected date. They do not represent the Moon’s exact position at your birth time and place.

A small record of that day
Date
Sat, May 31, 2025
Sunlit surface
21%
Lunar Date
Lunar 5/5

Share your first sky with someone close.

Moon on May 31, 2025 — Waxing Crescent

The Moon on May 31, 2025 is Waxing Crescent, with 21% illumination at noon KST. See and share the Moon from this date.

How to find the Moon on your birthday

  1. Choose your birth year, month and day, then show your Moon.
  2. Read the phase name and illuminated percentage. A Full Moon appears almost completely lit; a crescent shows a smaller sunlit portion.
  3. Select “Share this Moon” to create an image card for that date.

Does birth time or location change the result?

This date-only calculator uses Astronomy Engine at noon Korea Standard Time (03:00 UTC) on the selected date. It does not calculate the exact sky at your birth time or birthplace. Near a phase transition, a different time on the same date can give a different phase or illumination.

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