Moon Calendar for May, 2011
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Sunday, May 1, 2011 | Waning Crescent | 4.03% | π |
| Monday, May 2, 2011 | New Moon | 1.12% | π |
| Tuesday, May 3, 2011 | New Moon | 0.01% | π |
| Wednesday, May 4, 2011 | New Moon | 0.8% | π |
| Thursday, May 5, 2011 | New Moon | 3.54% | π |
| Friday, May 6, 2011 | Waxing Crescent | 8.21% | π |
| Saturday, May 7, 2011 | Waxing Crescent | 14.71% | π |
| Sunday, May 8, 2011 | Waxing Crescent | 22.86% | π |
| Monday, May 9, 2011 | First Quarter | 32.4% | π |
| Tuesday, May 10, 2011 | First Quarter | 42.95% | π |
| Wednesday, May 11, 2011 | First Quarter | 54.08% | π |
| Thursday, May 12, 2011 | First Quarter | 65.25% | π |
| Friday, May 13, 2011 | Waxing Gibbous | 75.86% | π |
| Saturday, May 14, 2011 | Waxing Gibbous | 85.22% | π |
| Sunday, May 15, 2011 | Waxing Gibbous | 92.68% | π |
| Monday, May 16, 2011 | Full Moon | 97.69% | π |
| Tuesday, May 17, 2011 | Full Moon | 99.9% | π |
| Wednesday, May 18, 2011 | Full Moon | 99.25% | π |
| Thursday, May 19, 2011 | Waning Gibbous | 95.93% | π |
| Friday, May 20, 2011 | Waning Gibbous | 90.37% | π |
| Saturday, May 21, 2011 | Waning Gibbous | 83.07% | π |
| Sunday, May 22, 2011 | Waning Gibbous | 74.55% | π |
| Monday, May 23, 2011 | Last Quarter | 65.27% | π |
| Tuesday, May 24, 2011 | Last Quarter | 55.65% | π |
| Wednesday, May 25, 2011 | Last Quarter | 46.01% | π |
| Thursday, May 26, 2011 | Last Quarter | 36.64% | π |
| Friday, May 27, 2011 | Waning Crescent | 27.8% | π |
| Saturday, May 28, 2011 | Waning Crescent | 19.74% | π |
| Sunday, May 29, 2011 | Waning Crescent | 12.72% | π |
| Monday, May 30, 2011 | Waning Crescent | 7% | π |
| Tuesday, May 31, 2011 | New Moon | 2.84% | π |