| Phase | Date |
|---|---|
| Wolf Moon | Tuesday, January 1, 1991 |
| Wolf Moon | Monday, January 28, 1991 |
| Snow Moon | Wednesday, February 27, 1991 |
| Worm Moon | Thursday, March 28, 1991 |
| Pink Moon | Saturday, April 27, 1991 |
| Flower Moon | Sunday, May 26, 1991 |
| Strawberry Moon | Tuesday, June 25, 1991 |
| Buck Moon | Wednesday, July 24, 1991 |
| Sturgeon Moon | Friday, August 23, 1991 |
| Harvest Moon (Corn Moon) | Sunday, September 22, 1991 |
| Hunter's Moon | Monday, October 21, 1991 |
| Beaver Moon | Wednesday, November 20, 1991 |
| Cold Moon | Thursday, December 19, 1991 |
The moon shows its full face to Earth once a month. Well, sort of. In fact, the same side of the moon always faces the planet, but part of it is in shadow. And, in reality most of the time the "full moon" is never perfectly full. Only when the moon, Earth and the sun are perfectly aligned is the moon 100 percent full, and that alignment produces a lunar eclipse. And sometimes — once in a blue moon — the moon is full twice in a month (or four times in a season, depending on which definition you prefer).