Moon Calendar for May, 2013
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Wednesday, May 1, 2013 | Last Quarter | 59.37% | π |
| Thursday, May 2, 2013 | Last Quarter | 48.15% | π |
| Friday, May 3, 2013 | Last Quarter | 37.27% | π |
| Saturday, May 4, 2013 | Waning Crescent | 27.21% | π |
| Sunday, May 5, 2013 | Waning Crescent | 18.37% | π |
| Monday, May 6, 2013 | Waning Crescent | 11.06% | π |
| Tuesday, May 7, 2013 | Waning Crescent | 5.51% | π |
| Wednesday, May 8, 2013 | New Moon | 1.85% | π |
| Thursday, May 9, 2013 | New Moon | 0.14% | π |
| Friday, May 10, 2013 | New Moon | 0.36% | π |
| Saturday, May 11, 2013 | New Moon | 2.44% | π |
| Sunday, May 12, 2013 | Waxing Crescent | 6.24% | π |
| Monday, May 13, 2013 | Waxing Crescent | 11.6% | π |
| Tuesday, May 14, 2013 | Waxing Crescent | 18.33% | π |
| Wednesday, May 15, 2013 | Waxing Crescent | 26.21% | π |
| Thursday, May 16, 2013 | First Quarter | 35.03% | π |
| Friday, May 17, 2013 | First Quarter | 44.55% | π |
| Saturday, May 18, 2013 | First Quarter | 54.49% | π |
| Sunday, May 19, 2013 | First Quarter | 64.53% | π |
| Monday, May 20, 2013 | Waxing Gibbous | 74.29% | π |
| Tuesday, May 21, 2013 | Waxing Gibbous | 83.26% | π |
| Wednesday, May 22, 2013 | Waxing Gibbous | 90.87% | π |
| Thursday, May 23, 2013 | Full Moon | 96.49% | π |
| Friday, May 24, 2013 | Full Moon | 99.55% | π |
| Saturday, May 25, 2013 | Full Moon | 99.68% | π |
| Sunday, May 26, 2013 | Full Moon | 96.76% | π |
| Monday, May 27, 2013 | Waning Gibbous | 91.02% | π |
| Tuesday, May 28, 2013 | Waning Gibbous | 82.99% | π |
| Wednesday, May 29, 2013 | Waning Gibbous | 73.32% | π |
| Thursday, May 30, 2013 | Last Quarter | 62.7% | π |
| Friday, May 31, 2013 | Last Quarter | 51.79% | π |