Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 77.67% | π |
| Sunday, May 2, 2021 | Last Quarter | 67.5% | π |
| Monday, May 3, 2021 | Last Quarter | 56.82% | π |
| Tuesday, May 4, 2021 | Last Quarter | 46.15% | π |
| Wednesday, May 5, 2021 | Last Quarter | 35.96% | π |
| Thursday, May 6, 2021 | Waning Crescent | 26.61% | π |
| Friday, May 7, 2021 | Waning Crescent | 18.36% | π |
| Saturday, May 8, 2021 | Waning Crescent | 11.45% | π |
| Sunday, May 9, 2021 | Waning Crescent | 6.06% | π |
| Monday, May 10, 2021 | New Moon | 2.32% | π |
| Tuesday, May 11, 2021 | New Moon | 0.33% | π |
| Wednesday, May 12, 2021 | New Moon | 0.14% | π |
| Thursday, May 13, 2021 | New Moon | 1.75% | π |
| Friday, May 14, 2021 | Waxing Crescent | 5.11% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 10.14% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 16.7% | π |
| Monday, May 17, 2021 | Waxing Crescent | 24.64% | π |
| Tuesday, May 18, 2021 | First Quarter | 33.72% | π |
| Wednesday, May 19, 2021 | First Quarter | 43.7% | π |
| Thursday, May 20, 2021 | First Quarter | 54.24% | π |
| Friday, May 21, 2021 | First Quarter | 64.93% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 75.25% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 84.56% | π |
| Monday, May 24, 2021 | Waxing Gibbous | 92.19% | π |
| Tuesday, May 25, 2021 | Full Moon | 97.47% | π |
| Wednesday, May 26, 2021 | Full Moon | 99.88% | π |
| Thursday, May 27, 2021 | Full Moon | 99.2% | π |
| Friday, May 28, 2021 | Waning Gibbous | 95.54% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 89.32% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 81.15% | π |
| Monday, May 31, 2021 | Waning Gibbous | 71.7% | π |