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. 
When it comes to the brand, the logo of the coke has not changed much since its inception. It may be a minor change in the source is all that changed. This has helped him stay in people’s minds. But Pepsi, on the other hand, has created several logos and slogans. This continued to change almost every year. Although the company and market analysts say that this is in tune with the changing trends of society, many do not accept it. Every time they see a new logo, they are afraid to try it thinking that all the drink has changed.