Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 69.97% | π |
| Sunday, May 2, 2021 | Last Quarter | 59.36% | π |
| Monday, May 3, 2021 | Last Quarter | 48.64% | π |
| Tuesday, May 4, 2021 | Last Quarter | 38.31% | π |
| Wednesday, May 5, 2021 | Waning Crescent | 28.72% | π |
| Thursday, May 6, 2021 | Waning Crescent | 20.19% | π |
| Friday, May 7, 2021 | Waning Crescent | 12.95% | π |
| Saturday, May 8, 2021 | Waning Crescent | 7.19% | π |
| Sunday, May 9, 2021 | New Moon | 3.05% | π |
| Monday, May 10, 2021 | New Moon | 0.64% | π |
| Tuesday, May 11, 2021 | New Moon | 0.02% | π |
| Wednesday, May 12, 2021 | New Moon | 1.21% | π |
| Thursday, May 13, 2021 | Waxing Crescent | 4.16% | π |
| Friday, May 14, 2021 | Waxing Crescent | 8.81% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 15.02% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 22.65% | π |
| Monday, May 17, 2021 | First Quarter | 31.49% | π |
| Tuesday, May 18, 2021 | First Quarter | 41.28% | π |
| Wednesday, May 19, 2021 | First Quarter | 51.72% | π |
| Thursday, May 20, 2021 | First Quarter | 62.42% | π |
| Friday, May 21, 2021 | Waxing Gibbous | 72.87% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 82.49% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 90.58% | π |
| Monday, May 24, 2021 | Full Moon | 96.47% | π |
| Tuesday, May 25, 2021 | Full Moon | 99.58% | π |
| Wednesday, May 26, 2021 | Full Moon | 99.64% | π |
| Thursday, May 27, 2021 | Full Moon | 96.65% | π |
| Friday, May 28, 2021 | Waning Gibbous | 90.99% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 83.22% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 74.01% | π |
| Monday, May 31, 2021 | Last Quarter | 63.99% | π |