PH22015000203Y1 - Perpetual calendar for the julian calendar - Google Patents

Abstract

A perpetual calendar that determines the day of any Julian calendar date that is in Anno Domini. This one-page perpetual calendar has five main tables: a days of the week table, a months table, a days of the month table, a years table and a leap years table. The days of the week table contains days Sunday to Saturday and numbers 0, 1, ... and _6 . The days of the week table repeats twice here. The months table contains months January to Decenber. The days of the month contains whole numbers 1 to 31. The years, a table with tables has four tables: a thousands' place table, a hundreds' place table, a tens' place table and a ones' place table. The thousands' place table contains numbers 1000, 2000, ... and 9000. The hundreds' place table contains numbers 100, 200, ... and 900. The tens' place table contains numbers 10, 20, ... and 90. The ones' place table contains whole numbers 1 to 9. The leap years, a table with tables has three tables: a leap years before a centennial table, a centennial table and a millenniums table. The leap years before a centennial table contains numbers 0, 4, 8, ... and 96. The centennials table contains -numbers 100, 200, ... and 900. The millenniums table contains numbers 1000, 2000, ... and 9000. Methods that adhere to both the Julian calendar and the Fortunado's algorithm, an algorithm for knowing the day of any Julian calendar date that is in Anno Domini are used to determine which row and column the contents are placed. Modifications will be made to make a calendar for each year. Modifications will be made to know the day of any Julian calendar date later than 9999 Anno Domini.