This document discusses methods for determining the day of the week for a given date. It provides the following key points: 1. It outlines the rules for determining if a year is a leap year based on whether the year is divisible by 4, 100, and 400. 2. It provides a formula using the reference year of 1601 to calculate the day of the week based on the century, year, and month values. 3. It works through examples of applying the formula to find the day of the week for specific dates like May 29, 1982 and Feb 11, 2011. 4. It also provides an example of determining the day of the first of January based on being given that there were