arithmetic formula, to take advantage of which to force and to serednyachku-student of the fifth gradeof general school.
Before to pass to it, will remind, that in most christian churches of
east ceremony (in particular, in greko-katolickiy and all of orthodox confessions of Ukraine) chronology is conducted on
the Julian calendar (or by old style) in a counterbalance to the catholic
churches of Europe and world, where from a 16 age of the system of chronology
conducted on the Gregorian calendar (by new style). A society calendar in
Ukraine answers new style. In 20 and 21 ages a difference in the dates of old
and new style makes 13 days. («Old» New Year in Ukraine is celebrated on
January, 14 - 14-1=13). As a result of shortchanging after this formula we will
get the date of old style, for a translation in new add a number 13. to it
Will designate the date of Easter character of x. For determination to
give Easter after a formula it is necessary to calculate a value to five
and is a remain from the division of number of year on 19
b is a remain from the division of number of year on 4
c is a remain from the division of number of year on 7
d is a remain from arithmetic expression (19a+15):30
e is a remain from arithmetic expression (2b+4c+6d+6):7.
If d+e<9, Easter is on
March, and determine its date after a formula:
x=22+d+e. If d+e>9, Easter is on April, and for determination to give a formula is used: x=d+e-9.
Now will calculate the date of pravoslavnogo of Easter of 2005. Remain from a division 2005 on 19 is evened:
2005:19=105(10); a=10. Determine like: b=1; c=3. Now value of the followings variables: (19 kh 10+15):30=6(25); d=25; (2 kh 1+4 kh 3+6 kh 25+6):7=24(2); e=2. d+e>9, consequently: x=25+2-9=18. Have on April, 18 after old style, or, taking into account that in
April 30 days, on May, 01 after new style.
A formula is universal, unique warning on the future: if going to arrive
to Carpathians on Easter of years through one hundred, must remember, that from
first January, 2101 a difference between old and new styles will make already