Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Saturday, May 1, 2021 | Waning Gibbous | 70.38% | π |
| Sunday, May 2, 2021 | Last Quarter | 59.77% | π |
| Monday, May 3, 2021 | Last Quarter | 49.06% | π |
| Tuesday, May 4, 2021 | Last Quarter | 38.7% | π |
| Wednesday, May 5, 2021 | Waning Crescent | 29.08% | π |
| Thursday, May 6, 2021 | Waning Crescent | 20.5% | π |
| Friday, May 7, 2021 | Waning Crescent | 13.21% | π |
| Saturday, May 8, 2021 | Waning Crescent | 7.38% | π |
| Sunday, May 9, 2021 | New Moon | 3.18% | π |
| Monday, May 10, 2021 | New Moon | 0.7% | π |
| Tuesday, May 11, 2021 | New Moon | 0.01% | π |
| Wednesday, May 12, 2021 | New Moon | 1.13% | π |
| Thursday, May 13, 2021 | Waxing Crescent | 4.01% | π |
| Friday, May 14, 2021 | Waxing Crescent | 8.59% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 14.75% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 22.33% | π |
| Monday, May 17, 2021 | First Quarter | 31.12% | π |
| Tuesday, May 18, 2021 | First Quarter | 40.89% | π |
| Wednesday, May 19, 2021 | First Quarter | 51.31% | π |
| Thursday, May 20, 2021 | First Quarter | 62% | π |
| Friday, May 21, 2021 | Waxing Gibbous | 72.48% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 82.14% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 90.3% | π |
| Monday, May 24, 2021 | Full Moon | 96.28% | π |
| Tuesday, May 25, 2021 | Full Moon | 99.52% | π |
| Wednesday, May 26, 2021 | Full Moon | 99.69% | π |
| Thursday, May 27, 2021 | Full Moon | 96.82% | π |
| Friday, May 28, 2021 | Waning Gibbous | 91.25% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 83.56% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 74.39% | π |
| Monday, May 31, 2021 | Last Quarter | 64.38% | π |