My Birthday Moon
The Moon from that day, here for you now.
Wed, September 24, 2031
First Quarter
Light and shadow, side by side. There was still room for the light to grow.
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
- Wed, September 24, 2031
- Sunlit surface
- 51%
- Lunar Date
- Lunar 8/8
Share your first sky with someone close.
Moon Phase on 24 September 2031: First Quarter, 51% Lit
The Moon on September 24, 2031
On September 24, 2031, the Moon will be at first quarter, 7.3 days old and 51% illuminated, in the constellation Sagittarius about 370,868 km (230,447 mi) from Earth. The next Full Moon will follow on September 30, 2031.
- Phase
- First Quarter
- Illumination
- 51%
- Moon age
- 7.3 days since New Moon
- Distance from Earth
- 370,868 km (230,447 mi)
- Constellation
- Sagittarius
- Previous Full Moon
- September 1, 2031
- Next New Moon
- October 16, 2031
- Next Full Moon
- September 30, 2031
Moon phases around September 24, 2031
| Date | Moon | Lit | Age |
|---|---|---|---|
| 9/21 Sun | Waxing Crescent | 20% | 4.3d |
| 9/22 Mon | Waxing Crescent | 29% | 5.3d |
| 9/23 Tue | Waxing Crescent | 40% | 6.3d |
| 9/24 Wed | First Quarter | 51% | 7.3d |
| 9/25 Thu | Waxing Gibbous | 62% | 8.3d |
| 9/26 Fri | Waxing Gibbous | 73% | 9.3d |
| 9/27 Sat | Waxing Gibbous | 83% | 10.3d |
Values are calculated with Astronomy Engine at 12:00 Korea Standard Time (03:00 UTC) on each date; New and Full Moon dates are in UTC. Moon age counts days since the New Moon; distance is centre to centre.
How to find the Moon on your birthday
- Choose your birth year, month and day, then show your Moon.
- Read the phase name and illuminated percentage. A Full Moon appears almost completely lit; a crescent shows a smaller sunlit portion.
- 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.