Moon Calendar for May, 2013
| Date | Moon Phase | Illumination | Moon Icon |
|---|---|---|---|
| Wednesday, May 1, 2013 | Last Quarter | 63.86% | π |
| Thursday, May 2, 2013 | Last Quarter | 52.66% | π |
| Friday, May 3, 2013 | Last Quarter | 41.58% | π |
| Saturday, May 4, 2013 | Last Quarter | 31.14% | π |
| Sunday, May 5, 2013 | Waning Crescent | 21.76% | π |
| Monday, May 6, 2013 | Waning Crescent | 13.8% | π |
| Tuesday, May 7, 2013 | Waning Crescent | 7.52% | π |
| Wednesday, May 8, 2013 | New Moon | 3.09% | π |
| Thursday, May 9, 2013 | New Moon | 0.59% | π |
| Friday, May 10, 2013 | New Moon | 0.04% | π |
| Saturday, May 11, 2013 | New Moon | 1.39% | π |
| Sunday, May 12, 2013 | Waxing Crescent | 4.51% | π |
| Monday, May 13, 2013 | Waxing Crescent | 9.26% | π |
| Tuesday, May 14, 2013 | Waxing Crescent | 15.46% | π |
| Wednesday, May 15, 2013 | Waxing Crescent | 22.91% | π |
| Thursday, May 16, 2013 | First Quarter | 31.38% | π |
| Friday, May 17, 2013 | First Quarter | 40.65% | π |
| Saturday, May 18, 2013 | First Quarter | 50.45% | π |
| Sunday, May 19, 2013 | First Quarter | 60.5% | π |
| Monday, May 20, 2013 | Waxing Gibbous | 70.42% | π |
| Tuesday, May 21, 2013 | Waxing Gibbous | 79.77% | π |
| Wednesday, May 22, 2013 | Waxing Gibbous | 88.01% | π |
| Thursday, May 23, 2013 | Waxing Gibbous | 94.5% | π |
| Friday, May 24, 2013 | Full Moon | 98.66% | π |
| Saturday, May 25, 2013 | Full Moon | 100% | π |
| Sunday, May 26, 2013 | Full Moon | 98.29% | π |
| Monday, May 27, 2013 | Waning Gibbous | 93.64% | π |
| Tuesday, May 28, 2013 | Waning Gibbous | 86.46% | π |
| Wednesday, May 29, 2013 | Waning Gibbous | 77.37% | π |
| Thursday, May 30, 2013 | Last Quarter | 67.05% | π |
| Friday, May 31, 2013 | Last Quarter | 56.19% | π |