Moon Calendar for May, 2013
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Wednesday, May 1, 2013 | Last Quarter | 57.78% | π |
| Thursday, May 2, 2013 | Last Quarter | 46.58% | π |
| Friday, May 3, 2013 | Last Quarter | 35.78% | π |
| Saturday, May 4, 2013 | Waning Crescent | 25.87% | π |
| Sunday, May 5, 2013 | Waning Crescent | 17.23% | π |
| Monday, May 6, 2013 | Waning Crescent | 10.16% | π |
| Tuesday, May 7, 2013 | Waning Crescent | 4.87% | π |
| Wednesday, May 8, 2013 | New Moon | 1.49% | π |
| Thursday, May 9, 2013 | New Moon | 0.06% | π |
| Friday, May 10, 2013 | New Moon | 0.55% | π |
| Saturday, May 11, 2013 | New Moon | 2.88% | π |
| Sunday, May 12, 2013 | Waxing Crescent | 6.91% | π |
| Monday, May 13, 2013 | Waxing Crescent | 12.48% | π |
| Tuesday, May 14, 2013 | Waxing Crescent | 19.38% | π |
| Wednesday, May 15, 2013 | Waxing Crescent | 27.41% | π |
| Thursday, May 16, 2013 | First Quarter | 36.35% | π |
| Friday, May 17, 2013 | First Quarter | 45.94% | π |
| Saturday, May 18, 2013 | First Quarter | 55.91% | π |
| Sunday, May 19, 2013 | First Quarter | 65.95% | π |
| Monday, May 20, 2013 | Waxing Gibbous | 75.62% | π |
| Tuesday, May 21, 2013 | Waxing Gibbous | 84.44% | π |
| Wednesday, May 22, 2013 | Waxing Gibbous | 91.8% | π |
| Thursday, May 23, 2013 | Full Moon | 97.09% | π |
| Friday, May 24, 2013 | Full Moon | 99.76% | π |
| Saturday, May 25, 2013 | Full Moon | 99.45% | π |
| Sunday, May 26, 2013 | Waning Gibbous | 96.1% | π |
| Monday, May 27, 2013 | Waning Gibbous | 90.01% | π |
| Tuesday, May 28, 2013 | Waning Gibbous | 81.7% | π |
| Wednesday, May 29, 2013 | Waning Gibbous | 71.85% | π |
| Thursday, May 30, 2013 | Last Quarter | 61.16% | π |
| Friday, May 31, 2013 | Last Quarter | 50.25% | π |