CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search There are various methods to calculate the day of the week for any particular date in the past or future. These methods ultimately rely on algorithms to determine the day of the week for any given date, including those based solely on tables as found in perpetual calendars that require no calculations to be performed by the user. A typical application is to calculate the day of the week on which someone was born or any other specific event occurred. 1 Introduction 2 Useful concepts 2.1 Corresponding months 2.2 Corresponding years 3 A tabular method to calculate the day of the week 3.1 Basic method for mental calculation 3.2 Complete table: Julian and Gregorian calendars 3.3 Revised Julian calendar 3.4 Sunday Letter 4 Other purely mathematical algorithms 4.1 Gauss's algo...