Moon Calendar for May, 2011
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Sunday, May 1, 2011 | New Moon | 2.6% | π |
| Monday, May 2, 2011 | New Moon | 0.43% | π |
| Tuesday, May 3, 2011 | New Moon | 0.1% | π |
| Wednesday, May 4, 2011 | New Moon | 1.7% | π |
| Thursday, May 5, 2011 | Waxing Crescent | 5.26% | π |
| Friday, May 6, 2011 | Waxing Crescent | 10.71% | π |
| Saturday, May 7, 2011 | Waxing Crescent | 17.93% | π |
| Sunday, May 8, 2011 | Waxing Crescent | 26.7% | π |
| Monday, May 9, 2011 | First Quarter | 36.71% | π |
| Tuesday, May 10, 2011 | First Quarter | 47.56% | π |
| Wednesday, May 11, 2011 | First Quarter | 58.78% | π |
| Thursday, May 12, 2011 | Waxing Gibbous | 69.79% | π |
| Friday, May 13, 2011 | Waxing Gibbous | 79.96% | π |
| Saturday, May 14, 2011 | Waxing Gibbous | 88.6% | π |
| Sunday, May 15, 2011 | Waxing Gibbous | 95.09% | π |
| Monday, May 16, 2011 | Full Moon | 98.96% | π |
| Tuesday, May 17, 2011 | Full Moon | 99.97% | π |
| Wednesday, May 18, 2011 | Full Moon | 98.17% | π |
| Thursday, May 19, 2011 | Waning Gibbous | 93.86% | π |
| Friday, May 20, 2011 | Waning Gibbous | 87.5% | π |
| Saturday, May 21, 2011 | Waning Gibbous | 79.63% | π |
| Sunday, May 22, 2011 | Waning Gibbous | 70.74% | π |
| Monday, May 23, 2011 | Last Quarter | 61.27% | π |
| Tuesday, May 24, 2011 | Last Quarter | 51.61% | π |
| Wednesday, May 25, 2011 | Last Quarter | 42.05% | π |
| Thursday, May 26, 2011 | Last Quarter | 32.86% | π |
| Friday, May 27, 2011 | Waning Crescent | 24.32% | π |
| Saturday, May 28, 2011 | Waning Crescent | 16.66% | π |
| Sunday, May 29, 2011 | Waning Crescent | 10.16% | π |
| Monday, May 30, 2011 | Waning Crescent | 5.06% | π |
| Tuesday, May 31, 2011 | New Moon | 1.62% | π |