henk-reints.nl
Quick Gregorian Date Calculations
Gregorian Year:
CCYY
CC
MOD 4
YY
= [0,1,2,3] ?
+
(
YY
DIV 4)
[8,6,4,2]
=
+
MOD 7
0
=
Mon
,
1
=
Tue
...
6
=
Sun
On this day are:
4/4
,
6/6
,
8/8
,
10/10
,
12/12
,
9/5
+
5/9
,
7/11
+
11/7
plus
0 Mar
and
0 Feb
(1 Feb in leap years).
