Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 76.21% | π |
| Sunday, May 2, 2021 | Last Quarter | 65.93% | π |
| Monday, May 3, 2021 | Last Quarter | 55.21% | π |
| Tuesday, May 4, 2021 | Last Quarter | 44.59% | π |
| Wednesday, May 5, 2021 | Last Quarter | 34.51% | π |
| Thursday, May 6, 2021 | Waning Crescent | 25.3% | π |
| Friday, May 7, 2021 | Waning Crescent | 17.24% | π |
| Saturday, May 8, 2021 | Waning Crescent | 10.54% | π |
| Sunday, May 9, 2021 | Waning Crescent | 5.39% | π |
| Monday, May 10, 2021 | New Moon | 1.91% | π |
| Tuesday, May 11, 2021 | New Moon | 0.19% | π |
| Wednesday, May 12, 2021 | New Moon | 0.27% | π |
| Thursday, May 13, 2021 | New Moon | 2.14% | π |
| Friday, May 14, 2021 | Waxing Crescent | 5.76% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 11.02% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 17.81% | π |
| Monday, May 17, 2021 | Waxing Crescent | 25.93% | π |
| Tuesday, May 18, 2021 | First Quarter | 35.16% | π |
| Wednesday, May 19, 2021 | First Quarter | 45.25% | π |
| Thursday, May 20, 2021 | First Quarter | 55.84% | π |
| Friday, May 21, 2021 | First Quarter | 66.51% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 76.72% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 85.83% | π |
| Monday, May 24, 2021 | Waxing Gibbous | 93.15% | π |
| Tuesday, May 25, 2021 | Full Moon | 98.02% | π |
| Wednesday, May 26, 2021 | Full Moon | 99.97% | π |
| Thursday, May 27, 2021 | Full Moon | 98.83% | π |
| Friday, May 28, 2021 | Waning Gibbous | 94.76% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 88.21% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 79.81% | π |
| Monday, May 31, 2021 | Waning Gibbous | 70.21% | π |