Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 73.63% | π |
| Sunday, May 2, 2021 | Last Quarter | 63.18% | π |
| Monday, May 3, 2021 | Last Quarter | 52.44% | π |
| Tuesday, May 4, 2021 | Last Quarter | 41.93% | π |
| Wednesday, May 5, 2021 | Last Quarter | 32.04% | π |
| Thursday, May 6, 2021 | Waning Crescent | 23.1% | π |
| Friday, May 7, 2021 | Waning Crescent | 15.37% | π |
| Saturday, May 8, 2021 | Waning Crescent | 9.06% | π |
| Sunday, May 9, 2021 | Waning Crescent | 4.33% | π |
| Monday, May 10, 2021 | New Moon | 1.3% | π |
| Tuesday, May 11, 2021 | New Moon | 0.04% | π |
| Wednesday, May 12, 2021 | New Moon | 0.58% | π |
| Thursday, May 13, 2021 | New Moon | 2.91% | π |
| Friday, May 14, 2021 | Waxing Crescent | 6.96% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 12.63% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 19.78% | π |
| Monday, May 17, 2021 | Waxing Crescent | 28.21% | π |
| Tuesday, May 18, 2021 | First Quarter | 37.69% | π |
| Wednesday, May 19, 2021 | First Quarter | 47.95% | π |
| Thursday, May 20, 2021 | First Quarter | 58.6% | π |
| Friday, May 21, 2021 | Waxing Gibbous | 69.21% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 79.2% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 87.91% | π |
| Monday, May 24, 2021 | Waxing Gibbous | 94.66% | π |
| Tuesday, May 25, 2021 | Full Moon | 98.81% | π |
| Wednesday, May 26, 2021 | Full Moon | 99.97% | π |
| Thursday, May 27, 2021 | Full Moon | 98.05% | π |
| Friday, May 28, 2021 | Waning Gibbous | 93.28% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 86.2% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 77.42% | π |
| Monday, May 31, 2021 | Last Quarter | 67.62% | π |