Blue Moon

Before the fireworks really hit the sky the 'blue moon' was well visible

Too bad I haven't made a better picture



An interpretation uses the other Old English meaning of belewe (which can mean "blue" or "betrayer"). The church was responsible for the calendar and used the complex computus to calculate the important date of Easter, which is based on the full moon. Lent falls before Easter, starting at the beginning of the Lent moon cycle (late winter moon). The next moon is the egg moon (early spring moon), and Easter usually falls on the first Sunday after the full egg moon. Every one to three years, the Lent and egg moons would come too early. The clergy would have to tell people whether the moon was the Lent moon or a false one, which they may have called a "betrayer moon".