Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 71.19% | π |
| Sunday, May 2, 2021 | Last Quarter | 60.62% | π |
| Monday, May 3, 2021 | Last Quarter | 49.89% | π |
| Tuesday, May 4, 2021 | Last Quarter | 39.49% | π |
| Wednesday, May 5, 2021 | Waning Crescent | 29.8% | π |
| Thursday, May 6, 2021 | Waning Crescent | 21.13% | π |
| Friday, May 7, 2021 | Waning Crescent | 13.73% | π |
| Saturday, May 8, 2021 | Waning Crescent | 7.78% | π |
| Sunday, May 9, 2021 | New Moon | 3.45% | π |
| Monday, May 10, 2021 | New Moon | 0.83% | π |
| Tuesday, May 11, 2021 | New Moon | 0% | π |
| Wednesday, May 12, 2021 | New Moon | 0.97% | π |
| Thursday, May 13, 2021 | New Moon | 3.72% | π |
| Friday, May 14, 2021 | Waxing Crescent | 8.18% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 14.22% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 21.69% | π |
| Monday, May 17, 2021 | Waxing Crescent | 30.4% | π |
| Tuesday, May 18, 2021 | First Quarter | 40.09% | π |
| Wednesday, May 19, 2021 | First Quarter | 50.48% | π |
| Thursday, May 20, 2021 | First Quarter | 61.17% | π |
| Friday, May 21, 2021 | Waxing Gibbous | 71.68% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 81.43% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 89.73% | π |
| Monday, May 24, 2021 | Waxing Gibbous | 95.91% | π |
| Tuesday, May 25, 2021 | Full Moon | 99.37% | π |
| Wednesday, May 26, 2021 | Full Moon | 99.79% | π |
| Thursday, May 27, 2021 | Full Moon | 97.15% | π |
| Friday, May 28, 2021 | Waning Gibbous | 91.78% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 84.22% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 75.15% | π |
| Monday, May 31, 2021 | Last Quarter | 65.19% | π |