Determination of the day of the week possible to do all the calculations in one's head with a little practice). None of the methods given here perform range checks, so unreasonable dates will produce erroneous results. Every seventh day in a month has the same name as the previous: "Corresponding months" are those months within the calendar year that start on the same day of the week. For example, September and December correspond, because September 1 falls on the same day as December 1. Months can only correspond if the number of days between their first days is divisible by 7, or in other words, if their
Distaff Day spindle with them. Spinning was the only means of turning raw wool, cotton or flax into thread, which could then be woven into cloth. Men have their own way of celebrating this occasion; this is done through Plough Monday. It is the first Monday after Epiphany where men are supposed to get back to work. Every few years, Distaff Day and Plough Monday falls on the same day. Often the men and women would play pranks on each other during this celebration, as was written by Robert Herrick in his poem "Saint Distaffs day, or the Morrow After Twelfth Day"