January has 31 days. It means that every date in February will be 3 days later than the same date in January(28 is 4 weeks exactly). The below table is calculated in such a way. Remember this table which will help you to calculate. January 0 February 3 March 3 April 6 May 1 June 4 July 6 August 2 September 5 October 0 November 3 December 5 Step1 : Ask for the Date. Ex: 23 rd June 1986 Step2 : Number of the month on the list, June is 4. Step3 : Take the date of the month, that is 23 Step4 : Take the last 2 digits of the year, that is 86. Step5 : Find out the number of leap years. Divide the last 2 digits of the year by 4, 86 divide by 4 is 21. Step6 : Now add all the 4 numbers: 4 + 23 + 86 + 21 = 134. Step7 : Divide 134 by 7 = 19 remainder 1. The reminder tells you the day. Sunday 0 Monday 1 Tuesday 2 Wednesday 3 Thursday 4 Friday 5 Saturday 6 Answer: Monday