Practicing Success
What was the day of the week on 15 May 1989? |
Sunday Monday Tuesday Wednesday |
Monday |
\(\frac{Date + Month\;code + Century\;code + Century\;upper\;year + Quotient\;of\;\frac{upper\;year}{4}}{7}\) \(\frac{15 + 1 + 0 + 89 + 22}{7}\) = \(\frac{127}{7}\) = Remainder 1 The day for Code 1 is Monday. Note: Code for Mon – 1 Tues – 2 Wed – 3 Thurs – 4 Fri – 5 Sat – 6 Sun – 0 Code for Jan – 0 Apr – 6 July – 6 Oct – 0 Feb – 3 May – 1 Aug – 2 Nov – 3 Mar – 3 June – 4 Sep – 5 Dec – 5 Code for 1900 is 0 2000 is 6 2100 is 4 2200 is 2 2300 is 0 2400 is 6 2500 is 4 and Likewise |