Formula For Determining The Day of the Week

Formula For Determining The Day of the Week
Formula	Example 1	Example 2
	25 Dec. 1848	19 Oct. 1781

Step 1.	Begin with the last 2 digits of the year.	48	81
Step 2.	Add Ľ of this number, desregarding any remainder.	12	20
Step 3.	Add the date in the month.	25	19
Step 4.	Add according to the month:

	January		1 (for leap year, 0)
	February		4 (for leap year, 3)
	March or November		4
	April or July		0
	May		2
	June		5
	Auust		3
	September or December		6	6
	October		1		1
Stept 5.	Add for the 18th century		4		4
		19th century	2	2
		20th century	0
		21st century	6	_____	_____
Step 6.	Total the numbers.			93	125
Stept 7.	Divide by 7. Check the remainder against the chart to determine the day of the week.			13 with a remainder of 2.	17 with a remainder of 6.
	1= Sunday		5= Thursday	Christmas was on Monday.	Cornwallis surrendered at Yorktown on Friday.
	2= Monday		6= Friday
	3= Tuesday		0= Saturday
	4= Wednesday

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