scc

 1/*
 2 * Happy New Year!!!!
 3 */
 4int
 5_newyear(int year)
 6{
 7	int day;
 8
 9	year += 1900 - 1;
10	day = 1 + year + year/4;
11	day -= year/100;
12	day += year/400;
13
14	return day % 7;
15}