diff --git a/src/localtime.c b/src/localtime.c index 8c1ff495..186c8e3c 100644 --- a/src/localtime.c +++ b/src/localtime.c @@ -50,10 +50,10 @@ * designed to work with what time(NULL) may return, and to support Redis * logging of the dates, it's not really a complete implementation. */ static int is_leap_year(time_t year) { - if (year % 4) return 0; - else if (year % 100) return 1; - else if (year % 400) return 0; - else return 1; + if (year % 4) return 0; /* A year divisible by 4 is not leap. */ + else if (year % 100) return 1; /* If div by 4 and not 100 is surely leap. */ + else if (year % 400) return 0; /* If div by 100 *and* 400 is not leap. */ + else return 1; /* If div by 100 and not by 400 is leap. */ } void nolocks_localtime(struct tm *tmp, time_t t, time_t tz, int dst) {