Full moon is called a blue moon. The term "blue moon" used in this sense may date to as early as the 16th century, but it became well known in the United States due to the "Farmers' Almanac" (published since 1818). According to the "Farmers' Almanac", a "blue moon" is the third full moon in any period between either solstice and equinox, or between equinox and solstice, (calculated using the mean tropical year), which contains four full moons. These seasons are equal in length, unlike the astronomical ones, which vary in length depending on the Earth's speed in its elliptical orbit round
The Reckoning of Time hour. The smallest increment of time is the atom. Here, Bede gives an exhaustive overview of the date of the Earth's creation, the months, the weeks and the Moon. He argues that the first day did not, as it was generally believed, take place at the time of an equinox. According to the religious accounts of God's creation of the universe, light was created on the first day. It wasn't until the fourth day, however, that God created the stars and therefore there was no measurement of hours. Much of this section is devoted to the Moon. Bede goes into