Moon Calendar for May, 2013
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Wednesday, May 1, 2013 | Last Quarter | 58.31% | π |
| Thursday, May 2, 2013 | Last Quarter | 47.11% | π |
| Friday, May 3, 2013 | Last Quarter | 36.28% | π |
| Saturday, May 4, 2013 | Waning Crescent | 26.32% | π |
| Sunday, May 5, 2013 | Waning Crescent | 17.61% | π |
| Monday, May 6, 2013 | Waning Crescent | 10.46% | π |
| Tuesday, May 7, 2013 | Waning Crescent | 5.08% | π |
| Wednesday, May 8, 2013 | New Moon | 1.6% | π |
| Thursday, May 9, 2013 | New Moon | 0.08% | π |
| Friday, May 10, 2013 | New Moon | 0.48% | π |
| Saturday, May 11, 2013 | New Moon | 2.73% | π |
| Sunday, May 12, 2013 | Waxing Crescent | 6.68% | π |
| Monday, May 13, 2013 | Waxing Crescent | 12.18% | π |
| Tuesday, May 14, 2013 | Waxing Crescent | 19.02% | π |
| Wednesday, May 15, 2013 | Waxing Crescent | 27.01% | π |
| Thursday, May 16, 2013 | First Quarter | 35.9% | π |
| Friday, May 17, 2013 | First Quarter | 45.47% | π |
| Saturday, May 18, 2013 | First Quarter | 55.43% | π |
| Sunday, May 19, 2013 | First Quarter | 65.47% | π |
| Monday, May 20, 2013 | Waxing Gibbous | 75.17% | π |
| Tuesday, May 21, 2013 | Waxing Gibbous | 84.04% | π |
| Wednesday, May 22, 2013 | Waxing Gibbous | 91.49% | π |
| Thursday, May 23, 2013 | Full Moon | 96.89% | π |
| Friday, May 24, 2013 | Full Moon | 99.7% | π |
| Saturday, May 25, 2013 | Full Moon | 99.53% | π |
| Sunday, May 26, 2013 | Full Moon | 96.33% | π |
| Monday, May 27, 2013 | Waning Gibbous | 90.36% | π |
| Tuesday, May 28, 2013 | Waning Gibbous | 82.14% | π |
| Wednesday, May 29, 2013 | Waning Gibbous | 72.35% | π |
| Thursday, May 30, 2013 | Last Quarter | 61.68% | π |
| Friday, May 31, 2013 | Last Quarter | 50.76% | π |