Moon Calendar for May, 2013
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Wednesday, May 1, 2013 | Last Quarter | 60.76% | π |
| Thursday, May 2, 2013 | Last Quarter | 49.54% | π |
| Friday, May 3, 2013 | Last Quarter | 38.58% | π |
| Saturday, May 4, 2013 | Waning Crescent | 28.4% | π |
| Sunday, May 5, 2013 | Waning Crescent | 19.39% | π |
| Monday, May 6, 2013 | Waning Crescent | 11.87% | π |
| Tuesday, May 7, 2013 | Waning Crescent | 6.1% | π |
| Wednesday, May 8, 2013 | New Moon | 2.2% | π |
| Thursday, May 9, 2013 | New Moon | 0.25% | π |
| Friday, May 10, 2013 | New Moon | 0.23% | π |
| Saturday, May 11, 2013 | New Moon | 2.08% | π |
| Sunday, May 12, 2013 | Waxing Crescent | 5.68% | π |
| Monday, May 13, 2013 | Waxing Crescent | 10.86% | π |
| Tuesday, May 14, 2013 | Waxing Crescent | 17.43% | π |
| Wednesday, May 15, 2013 | Waxing Crescent | 25.18% | π |
| Thursday, May 16, 2013 | First Quarter | 33.9% | π |
| Friday, May 17, 2013 | First Quarter | 43.34% | π |
| Saturday, May 18, 2013 | First Quarter | 53.24% | π |
| Sunday, May 19, 2013 | First Quarter | 63.29% | π |
| Monday, May 20, 2013 | Waxing Gibbous | 73.11% | π |
| Tuesday, May 21, 2013 | Waxing Gibbous | 82.21% | π |
| Wednesday, May 22, 2013 | Waxing Gibbous | 90.02% | π |
| Thursday, May 23, 2013 | Waxing Gibbous | 95.92% | π |
| Friday, May 24, 2013 | Full Moon | 99.33% | π |
| Saturday, May 25, 2013 | Full Moon | 99.83% | π |
| Sunday, May 26, 2013 | Full Moon | 97.28% | π |
| Monday, May 27, 2013 | Waning Gibbous | 91.87% | π |
| Tuesday, May 28, 2013 | Waning Gibbous | 84.09% | π |
| Wednesday, May 29, 2013 | Waning Gibbous | 74.58% | π |
| Thursday, May 30, 2013 | Last Quarter | 64.05% | π |
| Friday, May 31, 2013 | Last Quarter | 53.14% | π |