GENERAL MEETING. 15 
FORMULAS FOR THE COMPUTATION OF EASTER. 
In the calendar the vernal equinox is considered as invariably 
occurring on the 21st of March. 
The Paschal full moon is the full moon which (according to the 
calendar) occurs on or first after the 21st of March. 
Easter Sunday in any year is the first Sunday which occurs after 
the Paschal full moon; that is, first after the full moon which, 
according to the calendar, occurs on or first after March 21st. 
To find the date of Easter Sunday for any year, A. D., New Style. 
Let ¢ denote the complete hundreds of years in the number de- 
noting any year, and y the number of remaining years. Thus in 
the year 1883, c = 18 and y = 83, the number for the entire year, 
18838, being denoted by 100 ¢ + y. 
In the following formulas w, as a subscript after a division, de- 
notes that only the whole number of the quotient is to be retained, 
and r,as a subscript, denotes that only the remainder after the 
division. is to be retained; thus( 7) =4: and (=) we 
4 Ww 4 r 
nm (the golden number Jess one) 
= (8), = Ct), = C9, = GYD, 
=n LCs), + (i), J, 
This number (7) pertains to a lunar cycle of 19 years. 
8 
a” = (4) 
s=é—8— (4) -(‘# 25 Ww 
iy 3 Ww 
Inspection of the formula for s will show that, for any year from 
1700 A. D. New Style to 1899 A. D., both inclusive, the value of 
sis zero (0). For any year Old Style the value of s is the con- 
stant number 22. - 
23 
q= (a ma = =) ; also, 
r 
23 +s—11 *) 
I 
Pa 
WwW 
= 
