<Ul> <Li> In 5778, Rosh Hashanah is on Thursday, while Passover is on Saturday . </Li> </Ul> <Li> In 5778, Rosh Hashanah is on Thursday, while Passover is on Saturday . </Li> <Tr> <Td> According to the Machzor Katan, the 19 - year (Metonic) cycle used to keep the Hebrew calendar aligned with the solar year: <Ul> <Li> This year is the 2nd year of the 305th cycle . It is not a leap year . </Li> </Ul> </Td> </Tr> <Ul> <Li> This year is the 2nd year of the 305th cycle . It is not a leap year . </Li> </Ul>

Who determined how many days in a month