Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 70.59% | π |
| Sunday, May 2, 2021 | Last Quarter | 59.99% | π |
| Monday, May 3, 2021 | Last Quarter | 49.27% | π |
| Tuesday, May 4, 2021 | Last Quarter | 38.9% | π |
| Wednesday, May 5, 2021 | Waning Crescent | 29.26% | π |
| Thursday, May 6, 2021 | Waning Crescent | 20.66% | π |
| Friday, May 7, 2021 | Waning Crescent | 13.34% | π |
| Saturday, May 8, 2021 | Waning Crescent | 7.48% | π |
| Sunday, May 9, 2021 | New Moon | 3.25% | π |
| Monday, May 10, 2021 | New Moon | 0.73% | π |
| Tuesday, May 11, 2021 | New Moon | 0.01% | π |
| Wednesday, May 12, 2021 | New Moon | 1.09% | π |
| Thursday, May 13, 2021 | Waxing Crescent | 3.94% | π |
| Friday, May 14, 2021 | Waxing Crescent | 8.49% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 14.61% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 22.16% | π |
| Monday, May 17, 2021 | First Quarter | 30.93% | π |
| Tuesday, May 18, 2021 | First Quarter | 40.68% | π |
| Wednesday, May 19, 2021 | First Quarter | 51.09% | π |
| Thursday, May 20, 2021 | First Quarter | 61.79% | π |
| Friday, May 21, 2021 | Waxing Gibbous | 72.27% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 81.96% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 90.16% | π |
| Monday, May 24, 2021 | Waxing Gibbous | 96.19% | π |
| Tuesday, May 25, 2021 | Full Moon | 99.48% | π |
| Wednesday, May 26, 2021 | Full Moon | 99.72% | π |
| Thursday, May 27, 2021 | Full Moon | 96.91% | π |
| Friday, May 28, 2021 | Waning Gibbous | 91.39% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 83.73% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 74.59% | π |
| Monday, May 31, 2021 | Last Quarter | 64.59% | π |