OFFSET
1,1
COMMENTS
Includes all years starting on Sunday and leap years starting on Saturday.
"The Gregorian calendar has been in use in the Western world since 1582 by Roman Catholic countries and since 1752 by English speaking countries." The Mathematica Book.
LINKS
F. Campbell, Leap years with 53 Sundays, Popular Astronomy, 1917, Vol. 25, p.72
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
J. Lowell, May 17 2014
STATUS
approved