Moon Calendar for May, 2011
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Sunday, May 1, 2011 | New Moon | 1.62% | π |
| Monday, May 2, 2011 | New Moon | 0.1% | π |
| Tuesday, May 3, 2011 | New Moon | 0.45% | π |
| Wednesday, May 4, 2011 | New Moon | 2.75% | π |
| Thursday, May 5, 2011 | Waxing Crescent | 6.99% | π |
| Friday, May 6, 2011 | Waxing Crescent | 13.09% | π |
| Saturday, May 7, 2011 | Waxing Crescent | 20.9% | π |
| Sunday, May 8, 2011 | Waxing Crescent | 30.15% | π |
| Monday, May 9, 2011 | First Quarter | 40.51% | π |
| Tuesday, May 10, 2011 | First Quarter | 51.55% | π |
| Wednesday, May 11, 2011 | First Quarter | 62.76% | π |
| Thursday, May 12, 2011 | Waxing Gibbous | 73.55% | π |
| Friday, May 13, 2011 | Waxing Gibbous | 83.25% | π |
| Saturday, May 14, 2011 | Waxing Gibbous | 91.19% | π |
| Sunday, May 15, 2011 | Full Moon | 96.79% | π |
| Monday, May 16, 2011 | Full Moon | 99.65% | π |
| Tuesday, May 17, 2011 | Full Moon | 99.64% | π |
| Wednesday, May 18, 2011 | Full Moon | 96.89% | π |
| Thursday, May 19, 2011 | Waning Gibbous | 91.8% | π |
| Friday, May 20, 2011 | Waning Gibbous | 84.84% | π |
| Saturday, May 21, 2011 | Waning Gibbous | 76.55% | π |
| Sunday, May 22, 2011 | Last Quarter | 67.41% | π |
| Monday, May 23, 2011 | Last Quarter | 57.83% | π |
| Tuesday, May 24, 2011 | Last Quarter | 48.17% | π |
| Wednesday, May 25, 2011 | Last Quarter | 38.71% | π |
| Thursday, May 26, 2011 | Waning Crescent | 29.73% | π |
| Friday, May 27, 2011 | Waning Crescent | 21.47% | π |
| Saturday, May 28, 2011 | Waning Crescent | 14.2% | π |
| Sunday, May 29, 2011 | Waning Crescent | 8.16% | π |
| Monday, May 30, 2011 | New Moon | 3.63% | π |
| Tuesday, May 31, 2011 | New Moon | 0.84% | π |