Moon Calendar for May, 2011
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Sunday, May 1, 2011 | Waning Crescent | 3.84% | π |
| Monday, May 2, 2011 | New Moon | 1.02% | π |
| Tuesday, May 3, 2011 | New Moon | 0% | π |
| Wednesday, May 4, 2011 | New Moon | 0.89% | π |
| Thursday, May 5, 2011 | New Moon | 3.73% | π |
| Friday, May 6, 2011 | Waxing Crescent | 8.5% | π |
| Saturday, May 7, 2011 | Waxing Crescent | 15.1% | π |
| Sunday, May 8, 2011 | Waxing Crescent | 23.33% | π |
| Monday, May 9, 2011 | First Quarter | 32.92% | π |
| Tuesday, May 10, 2011 | First Quarter | 43.52% | π |
| Wednesday, May 11, 2011 | First Quarter | 54.67% | π |
| Thursday, May 12, 2011 | First Quarter | 65.82% | π |
| Friday, May 13, 2011 | Waxing Gibbous | 76.38% | π |
| Saturday, May 14, 2011 | Waxing Gibbous | 85.65% | π |
| Sunday, May 15, 2011 | Waxing Gibbous | 93% | π |
| Monday, May 16, 2011 | Full Moon | 97.87% | π |
| Tuesday, May 17, 2011 | Full Moon | 99.93% | π |
| Wednesday, May 18, 2011 | Full Moon | 99.14% | π |
| Thursday, May 19, 2011 | Waning Gibbous | 95.7% | π |
| Friday, May 20, 2011 | Waning Gibbous | 90.03% | π |
| Saturday, May 21, 2011 | Waning Gibbous | 82.65% | π |
| Sunday, May 22, 2011 | Waning Gibbous | 74.08% | π |
| Monday, May 23, 2011 | Last Quarter | 64.78% | π |
| Tuesday, May 24, 2011 | Last Quarter | 55.15% | π |
| Wednesday, May 25, 2011 | Last Quarter | 45.51% | π |
| Thursday, May 26, 2011 | Last Quarter | 36.16% | π |
| Friday, May 27, 2011 | Waning Crescent | 27.36% | π |
| Saturday, May 28, 2011 | Waning Crescent | 19.35% | π |
| Sunday, May 29, 2011 | Waning Crescent | 12.39% | π |
| Monday, May 30, 2011 | Waning Crescent | 6.74% | π |
| Tuesday, May 31, 2011 | New Moon | 2.67% | π |