Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 69.88% | π |
| Sunday, May 2, 2021 | Last Quarter | 59.26% | π |
| Monday, May 3, 2021 | Last Quarter | 48.54% | π |
| Tuesday, May 4, 2021 | Last Quarter | 38.21% | π |
| Wednesday, May 5, 2021 | Waning Crescent | 28.64% | π |
| Thursday, May 6, 2021 | Waning Crescent | 20.12% | π |
| Friday, May 7, 2021 | Waning Crescent | 12.89% | π |
| Saturday, May 8, 2021 | Waning Crescent | 7.14% | π |
| Sunday, May 9, 2021 | New Moon | 3.02% | π |
| Monday, May 10, 2021 | New Moon | 0.63% | π |
| Tuesday, May 11, 2021 | New Moon | 0.03% | π |
| Wednesday, May 12, 2021 | New Moon | 1.23% | π |
| Thursday, May 13, 2021 | Waxing Crescent | 4.2% | π |
| Friday, May 14, 2021 | Waxing Crescent | 8.86% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 15.09% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 22.73% | π |
| Monday, May 17, 2021 | First Quarter | 31.57% | π |
| Tuesday, May 18, 2021 | First Quarter | 41.38% | π |
| Wednesday, May 19, 2021 | First Quarter | 51.82% | π |
| Thursday, May 20, 2021 | First Quarter | 62.52% | π |
| Friday, May 21, 2021 | Waxing Gibbous | 72.97% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 82.57% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 90.65% | π |
| Monday, May 24, 2021 | Full Moon | 96.51% | π |
| Tuesday, May 25, 2021 | Full Moon | 99.6% | π |
| Wednesday, May 26, 2021 | Full Moon | 99.62% | π |
| Thursday, May 27, 2021 | Full Moon | 96.61% | π |
| Friday, May 28, 2021 | Waning Gibbous | 90.93% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 83.14% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 73.92% | π |
| Monday, May 31, 2021 | Last Quarter | 63.89% | π |