Two factors led to the creation of three new forms of the epact in the Fifteenth and Sixteenth centuries. The first was the increasing error of computistical techniques, which led to the introduction of a new Julian epact around 1478, to be used for practical computations of the phase of the Moon for medical or astrological purposes. With the Gregorian reform of the calendar in 1582, two additional epacts came into use. The first was the Lillian epact, developed by Aloisius Lilius as an element of the ecclesiastical computations using the Gregorian calendar. The Lillian epact included corrections for the motions of the Sun and the Moon that broke the fixed relationship between the epact and the golden number. The second new epact was a simple adjustment of the practical Julian epact to account for the ten-day change produced by the Gregorian Calendar. 
Butterflies and moths have a lot in common. They're both part of the scientific order Lepidoptera , meaning scale winged . The name comes from those powdery scales that come off when they're touched. But butterflies and moths have more similarities than just their dusty wings. Both insects start their lives as hungry caterpillars before transforming themselves completely into their flying adult forms. They both eat nectar from flowers, and they supplement their diet with other liquids, like mineral-filled standing water and the juice from rotting fruit.