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• (4n, 366 days, Feb-29 days, 2 odd days)
• (Not Multiple of 4n, 365 days, Feb-28 days, 1 odd days)
 In case of Century Year Leap Year must be multiple of 400
REFERENCE YEAR:
Note: For monthly odd day remember the series:
3 0 (1) 3 2 3 2 3 3 2 3 2 3
J F M A M J J A S O N D
Monthly Odd Days:
To find Day & any random Date formula is:
Where:
Y= (Last 2 digits of year) – 1
Example : For 1947, Y is 46.
Y/4 = Non-decimal Quotient obtained by dividing
4.
Example : For 1947, Y/4 is 11.(46/4,Quotient is 11)
Q3.What is the day of the week on 29th May,1982?
Ans: RY= 1601
CY=1982
century=3
c=1
Y=81
(Y/4)=(81/4)=20
M =303232332323
(8+29)=37
C+Y/4+Y+M
1+81+20+37
(139/7)=6 i.e; Saturday
Q4 .What is the day of the week on 11th Feb 2011?
Ans: RY= 2001
CY=2011
century=1
c=0
Y=10
(Y/4)=(10/4)=2
M =(3 + 11)
=14
C+Y/4+Y+M
0 + 2 + 10 + 14
(26/7)=5 i.e ; Friday
Q5.What is the day of the week on 22nd Dec,1985?
Ans: RY= 1601
CY=1985
century=3
c=1
Y=84
(Y/4)=(84/4)=21
M =(3+0+3+2+3+2+3+3+2+3+2+22)
= 50
C+Y/4+Y+M
1+21+84 +50
(154/7)=0 i.e ; Sunday
Q6.There are five mondays and five tuesdays in the month of April in
certain non leap year. What day was Jan 1st of that year?
Ans:5 Mondays and 5 Tuesdays in April
April has 30 days i.e; 4 full weeks and 2 days.
So if there are 5 Mondays and 5 Tuesdays, therefore 29th and 30th of
the month were Monday and Tuesday.
Apr 1st=Monday. This was non leap year.
Jan-31days,Feb 28 days, Mar 31 days. The 91st day iof the year is
Monday. So the first day should have been a Tuesday.

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Calendar

  • 1.
  • 3. • (4n, 366 days, Feb-29 days, 2 odd days) • (Not Multiple of 4n, 365 days, Feb-28 days, 1 odd days)  In case of Century Year Leap Year must be multiple of 400
  • 4.
  • 5.
  • 7.
  • 8.
  • 9. Note: For monthly odd day remember the series: 3 0 (1) 3 2 3 2 3 3 2 3 2 3 J F M A M J J A S O N D Monthly Odd Days:
  • 10. To find Day & any random Date formula is: Where: Y= (Last 2 digits of year) – 1 Example : For 1947, Y is 46. Y/4 = Non-decimal Quotient obtained by dividing 4. Example : For 1947, Y/4 is 11.(46/4,Quotient is 11)
  • 11.
  • 12.
  • 13. Q3.What is the day of the week on 29th May,1982? Ans: RY= 1601 CY=1982 century=3 c=1 Y=81 (Y/4)=(81/4)=20 M =303232332323 (8+29)=37 C+Y/4+Y+M 1+81+20+37 (139/7)=6 i.e; Saturday
  • 14. Q4 .What is the day of the week on 11th Feb 2011? Ans: RY= 2001 CY=2011 century=1 c=0 Y=10 (Y/4)=(10/4)=2 M =(3 + 11) =14 C+Y/4+Y+M 0 + 2 + 10 + 14 (26/7)=5 i.e ; Friday
  • 15. Q5.What is the day of the week on 22nd Dec,1985? Ans: RY= 1601 CY=1985 century=3 c=1 Y=84 (Y/4)=(84/4)=21 M =(3+0+3+2+3+2+3+3+2+3+2+22) = 50 C+Y/4+Y+M 1+21+84 +50 (154/7)=0 i.e ; Sunday
  • 16. Q6.There are five mondays and five tuesdays in the month of April in certain non leap year. What day was Jan 1st of that year? Ans:5 Mondays and 5 Tuesdays in April April has 30 days i.e; 4 full weeks and 2 days. So if there are 5 Mondays and 5 Tuesdays, therefore 29th and 30th of the month were Monday and Tuesday. Apr 1st=Monday. This was non leap year. Jan-31days,Feb 28 days, Mar 31 days. The 91st day iof the year is Monday. So the first day should have been a Tuesday.