Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 75.25% | π |
| Sunday, May 2, 2021 | Last Quarter | 64.91% | π |
| Monday, May 3, 2021 | Last Quarter | 54.18% | π |
| Tuesday, May 4, 2021 | Last Quarter | 43.59% | π |
| Wednesday, May 5, 2021 | Last Quarter | 33.58% | π |
| Thursday, May 6, 2021 | Waning Crescent | 24.47% | π |
| Friday, May 7, 2021 | Waning Crescent | 16.53% | π |
| Saturday, May 8, 2021 | Waning Crescent | 9.98% | π |
| Sunday, May 9, 2021 | Waning Crescent | 4.98% | π |
| Monday, May 10, 2021 | New Moon | 1.67% | π |
| Tuesday, May 11, 2021 | New Moon | 0.12% | π |
| Wednesday, May 12, 2021 | New Moon | 0.37% | π |
| Thursday, May 13, 2021 | New Moon | 2.41% | π |
| Friday, May 14, 2021 | Waxing Crescent | 6.19% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 11.61% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 18.53% | π |
| Monday, May 17, 2021 | Waxing Crescent | 26.77% | π |
| Tuesday, May 18, 2021 | First Quarter | 36.1% | π |
| Wednesday, May 19, 2021 | First Quarter | 46.25% | π |
| Thursday, May 20, 2021 | First Quarter | 56.87% | π |
| Friday, May 21, 2021 | First Quarter | 67.52% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 77.65% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 86.62% | π |
| Monday, May 24, 2021 | Waxing Gibbous | 93.73% | π |
| Tuesday, May 25, 2021 | Full Moon | 98.34% | π |
| Wednesday, May 26, 2021 | Full Moon | 100% | π |
| Thursday, May 27, 2021 | Full Moon | 98.56% | π |
| Friday, May 28, 2021 | Waning Gibbous | 94.23% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 87.47% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 78.93% | π |
| Monday, May 31, 2021 | Waning Gibbous | 69.25% | π |