Calender Trick , How to find days of any Calendar date of any year

How to find days of any Calendar date of any year?
First know this code for 20th century 144 025 036 146 ,
easy to remember square of 12 , square of 5 , square of 6 and 146 !
In the above code each digit represents a month ...starting from right ...1 for Jan, 4 for Feb, 4 for March...0 for April ...2 for may..5 for june...etc
Then remember another
code that is sunday =1, monday=2 , tuesday=3 etc ..till saturday = 0..
Now, let us take the example :
What day it was on 15/08/1947 ?
Follow the below given steps :
‎1. write last two digits of the year ................... 47
‎2. no. of leap years till 1947 .....(47/4 = 11 take only quotient) = 11
‎3. write code of the month ...august (refer code) .......= 03 ‎
4. write the day.....................................15
5. add all the four ....47 + 11 + 03 + 15 = 76
6. divide the sum always by 7 = 76/7 and take the remainder. here the remainder is 6, now refer to the second code , 6 = friday. so, 15 /08/1947 was Friday !
with little practice you will be able to calculate in mind...as you are doing simple addition and division!!!!!!! :)
code for 21st century : 033 614 625 035
How to write code for any century on our own?? >>
for all future centuries, codes go on subtracting 1 from previous codes...& for all past centuries, codes go on adding 1.. so...future is -1, past is +1
NOTE: If you subtract 1 from 0 we get 6 here...it is called MOD7