Prophetic Year have been taken by many as talking about equal periods of time. Prophetic Months Other interpretations, (reference 4) have taken instead, prophetic months as equal to an average of 30.44 years based on 365.2422 divided by 12. Prophetic Year In Biblical eschatology a Prophetic Year or Prophetical Year is sometimes regarded as being different from an ordinary year, namely The names Apocalyptic Year and Apocalyptical Year have also been used in some literature, in obvious reference to Revelation, also known as "The Apocalypse of St. John". The fact that the prophets understood a year as 360 days is well attested,
Thirty Days Hath September Thirty Days Hath September "Thirty Days Hath September..." or "Thirty Days Has September..." is a traditional verse mnemonic used to remember the number of days in the months of the Julian and Gregorian calendars. It arose as an oral tradition and exists in many variants. It is currently earliest attested in English, but was and remains common throughout Europe as well. The irregularity of the lengths of the months descends from the Roman calendar, which came to be adopted throughout Europe and then worldwide. The months of Rome's original lunar calendar would have varied between 29 and 30 days, depending