My Birthday Moon

The Moon from that day, here for you now.

Mon, February 17, 2031

Waning Crescent

A slender light before the new Moon. Between one ending and the next beginning.

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: Mon, February 17, 2031
Sunlit surface: 26%
Lunar Date: Lunar 1/26

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Moon Phase on 17 February 2031: Waning Crescent, 26% Lit

The Moon on 17 February 2031: Waning Crescent, 26% illuminated — Rendered view of the Moon on 17 February 2031 from NASA lunar surface maps

The Moon on February 17, 2031

On February 17, 2031, the Moon will be a waning crescent, 24.9 days old and 26% illuminated, in the constellation Sagittarius about 366,798 km (227,918 mi) from Earth. The next New Moon will follow on February 21, 2031.

Phase: Waning Crescent
Illumination: 26%
Moon age: 24.9 days since New Moon
Distance from Earth: 366,798 km (227,918 mi)
Constellation: Sagittarius
Previous Full Moon: February 7, 2031
Next New Moon: February 21, 2031
Next Full Moon: March 9, 2031

Moon phases around February 17, 2031

Moon phase, illumination and age for the three days before and after February 17, 2031
Date	Moon	Lit	Age
2/14 Fri	Waning Gibbous	59%	21.9d
2/15 Sat	Waning Crescent	48%	22.9d
2/16 Sun	Waning Crescent	37%	23.9d
2/17 Mon	Waning Crescent	26%	24.9d
2/18 Tue	Waning Crescent	17%	25.9d
2/19 Wed	Waning Crescent	9%	26.9d
2/20 Thu	Waning Crescent	3%	27.9d

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.