shithub: scc

ref: 6903173cd0f863498a40f0e595ce83b881d71edb
dir: /src/libc/time/_newyear.c/

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/*
 * Happy New Year!!!!
 */
int
_newyear(int year)
{
	int day;

	year += 1900 - 1;
	day = 1 + year + year/4;
	day -= year/100;
	day += year/400;

	return day % 7;
}