This is used to determine the day of the week for any date after 14 September, 1752.
MAGIC NUMBERS FOR FINDING THE DAY OF THE WEEK
Note: 1800 and 1900 are not leap years.
Day of the Week
Sunday1
Monday2
Tuesday3
Wednesday4
Thursday5
Friday6
Saturday0
Regular YearMonth
January3
February6
March6
April2
May4
June0
July2
August5
September1
October3
November6
December1
Leap Year Month
has the following magic numbers:
January2
February5
March6
April2
May4
June0
July2
August5
September1
October3
November6
December1
Each Century
1700's2
1800's0
1900's5
2000's4
2100's2
A. Write down the century magic number: ______
B. Write down the year: ______
Cross off the first two digits: ______
Write this new number on the side: ______
C.Divide this new number by 4: ______
Cross off anything that comes after a decimal: ______
Write this new number in the blank:______
D. Write down the magic value for the month:______
E. Write down the day of the month: ______
F. Add up all the numbers in the column on the right:______
G. Divide F by 7 by hand.
What is the remainder: ______
What day of the week is this the Magic Number for?______
That’s the answer.
Example: Suppose we want to know what day of the week 26 December, 2006 is.
MAGIC NUMBERS FOR FINDING THE DAY OF THE WEEK
Note: 1800 and 1900 are not leap years.
Day of the Week
Sunday1
Monday2
Tuesday3
Wednesday4
Thursday5
Friday6
Saturday0
Regular YearMonth
January3
February6
March6
April2
May4
June0
July2
August5
September1
October3
November6
December1
Leap Year Month
has the following magic numbers:
January2
February5
March6
April2
May4
June0
July2
August5
September1
October3
November6
December1
Each Century
1700's2
1800's0
1900's5
2000's4
2100's2
A. Write down the century magic number: 4
B. Write down the year: 2006
Cross off the first two digits: 2006
Write this new number on the side: 06
C.Divide this new number by 4: 1.5
Cross off anything that comes after a decimal: 1.5
Write this new number in the blank: 1
D. Write down the magic value for the month: 1
E. Write down the day of the month: 26
F. Add up all the numbers in the column on the right: 38
G. Divide F by 7 by hand. 38 / 7 = 5 remainder 3
What is the remainder: 3
What day of the week is this the Magic Number for?Tuesday
That’s the answer.