Moon Calendar for May, 2021
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Friday, April 30, 2021 | Waning Gibbous | 78.55% | π |
| Saturday, May 1, 2021 | Last Quarter | 68.46% | π |
| Sunday, May 2, 2021 | Last Quarter | 57.8% | π |
| Monday, May 3, 2021 | Last Quarter | 47.11% | π |
| Tuesday, May 4, 2021 | Last Quarter | 36.87% | π |
| Wednesday, May 5, 2021 | Waning Crescent | 27.42% | π |
| Thursday, May 6, 2021 | Waning Crescent | 19.06% | π |
| Friday, May 7, 2021 | Waning Crescent | 12.02% | π |
| Saturday, May 8, 2021 | Waning Crescent | 6.48% | π |
| Sunday, May 9, 2021 | New Moon | 2.59% | π |
| Monday, May 10, 2021 | New Moon | 0.44% | π |
| Tuesday, May 11, 2021 | New Moon | 0.08% | π |
| Wednesday, May 12, 2021 | New Moon | 1.53% | π |
| Thursday, May 13, 2021 | Waxing Crescent | 4.73% | π |
| Friday, May 14, 2021 | Waxing Crescent | 9.61% | π |
| Saturday, May 15, 2021 | Waxing Crescent | 16.04% | π |
| Sunday, May 16, 2021 | Waxing Crescent | 23.86% | π |
| Monday, May 17, 2021 | First Quarter | 32.85% | π |
| Tuesday, May 18, 2021 | First Quarter | 42.76% | π |
| Wednesday, May 19, 2021 | First Quarter | 53.27% | π |
| Thursday, May 20, 2021 | First Quarter | 63.96% | π |
| Friday, May 21, 2021 | Waxing Gibbous | 74.33% | π |
| Saturday, May 22, 2021 | Waxing Gibbous | 83.77% | π |
| Sunday, May 23, 2021 | Waxing Gibbous | 91.58% | π |
| Monday, May 24, 2021 | Full Moon | 97.1% | π |
| Tuesday, May 25, 2021 | Full Moon | 99.78% | π |
| Wednesday, May 26, 2021 | Full Moon | 99.39% | π |
| Thursday, May 27, 2021 | Waning Gibbous | 95.99% | π |
| Friday, May 28, 2021 | Waning Gibbous | 89.98% | π |
| Saturday, May 29, 2021 | Waning Gibbous | 81.96% | π |
| Sunday, May 30, 2021 | Waning Gibbous | 72.6% | π |