Moon Calendar for May, 2013
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Wednesday, May 1, 2013 | Last Quarter | 62.86% | π |
| Thursday, May 2, 2013 | Last Quarter | 51.65% | π |
| Friday, May 3, 2013 | Last Quarter | 40.6% | π |
| Saturday, May 4, 2013 | Waning Crescent | 30.24% | π |
| Sunday, May 5, 2013 | Waning Crescent | 20.98% | π |
| Monday, May 6, 2013 | Waning Crescent | 13.16% | π |
| Tuesday, May 7, 2013 | Waning Crescent | 7.04% | π |
| Wednesday, May 8, 2013 | New Moon | 2.78% | π |
| Thursday, May 9, 2013 | New Moon | 0.46% | π |
| Friday, May 10, 2013 | New Moon | 0.09% | π |
| Saturday, May 11, 2013 | New Moon | 1.6% | π |
| Sunday, May 12, 2013 | Waxing Crescent | 4.88% | π |
| Monday, May 13, 2013 | Waxing Crescent | 9.77% | π |
| Tuesday, May 14, 2013 | Waxing Crescent | 16.09% | π |
| Wednesday, May 15, 2013 | Waxing Crescent | 23.64% | π |
| Thursday, May 16, 2013 | First Quarter | 32.19% | π |
| Friday, May 17, 2013 | First Quarter | 41.52% | π |
| Saturday, May 18, 2013 | First Quarter | 51.35% | π |
| Sunday, May 19, 2013 | First Quarter | 61.41% | π |
| Monday, May 20, 2013 | Waxing Gibbous | 71.3% | π |
| Tuesday, May 21, 2013 | Waxing Gibbous | 80.57% | π |
| Wednesday, May 22, 2013 | Waxing Gibbous | 88.67% | π |
| Thursday, May 23, 2013 | Waxing Gibbous | 94.98% | π |
| Friday, May 24, 2013 | Full Moon | 98.9% | π |
| Saturday, May 25, 2013 | Full Moon | 99.97% | π |
| Sunday, May 26, 2013 | Full Moon | 97.99% | π |
| Monday, May 27, 2013 | Waning Gibbous | 93.09% | π |
| Tuesday, May 28, 2013 | Waning Gibbous | 85.71% | π |
| Wednesday, May 29, 2013 | Waning Gibbous | 76.47% | π |
| Thursday, May 30, 2013 | Last Quarter | 66.08% | π |
| Friday, May 31, 2013 | Last Quarter | 55.2% | π |