Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 74.37% | π |
| Sunday, May 2, 2021 | Last Quarter | 63.96% | π |
| Monday, May 3, 2021 | Last Quarter | 53.23% | π |
| Tuesday, May 4, 2021 | Last Quarter | 42.68% | π |
| Wednesday, May 5, 2021 | Last Quarter | 32.73% | π |
| Thursday, May 6, 2021 | Waning Crescent | 23.71% | π |
| Friday, May 7, 2021 | Waning Crescent | 15.89% | π |
| Saturday, May 8, 2021 | Waning Crescent | 9.47% | π |
| Sunday, May 9, 2021 | Waning Crescent | 4.62% | π |
| Monday, May 10, 2021 | New Moon | 1.46% | π |
| Tuesday, May 11, 2021 | New Moon | 0.07% | π |
| Wednesday, May 12, 2021 | New Moon | 0.48% | π |
| Thursday, May 13, 2021 | New Moon | 2.68% | π |
| Friday, May 14, 2021 | Waxing Crescent | 6.61% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 12.17% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 19.21% | π |
| Monday, May 17, 2021 | Waxing Crescent | 27.56% | π |
| Tuesday, May 18, 2021 | First Quarter | 36.97% | π |
| Wednesday, May 19, 2021 | First Quarter | 47.18% | π |
| Thursday, May 20, 2021 | First Quarter | 57.82% | π |
| Friday, May 21, 2021 | First Quarter | 68.45% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 78.5% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 87.33% | π |
| Monday, May 24, 2021 | Waxing Gibbous | 94.25% | π |
| Tuesday, May 25, 2021 | Full Moon | 98.61% | π |
| Wednesday, May 26, 2021 | Full Moon | 100% | π |
| Thursday, May 27, 2021 | Full Moon | 98.29% | π |
| Friday, May 28, 2021 | Waning Gibbous | 93.72% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 86.78% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 78.11% | π |
| Monday, May 31, 2021 | Last Quarter | 68.36% | π |