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
First day on the Somme when German artillery was being withdrawn. On 16 April, Rawlinson announced the objectives to the corps commanders, in which III, X and VIII corps would capture Pozières, Grandcourt and Serre on the first day and XIII and XV corps would have objectives to be agreed later. On 19 April, Rawlinson wrote that an attempt to reach the German second line on the first day was doubtful, an extension of the attack in the south on Montauban required another division and the inclusion of Gommecourt to the north, was beyond the capability of the Fourth Army. Rawlinson also wrote that long