SECS_PER_DAY
#define SECS_PER_DAY (SECS_PER_HOUR * 24)
#define SECS_PER_DAY (24 * 60 * 60)
#define SECS_PER_DAY 86400
#define SECS_PER_DAY (24 * 60 * 60)
#define SECS_PER_DAY (24 * 3600ULL)
#define SECS_PER_DAY (SECS_PER_HOUR * 24)
#define SECS_PER_DAY 86400
#define SECS_PER_DAY (SECS_PER_HOUR * 24)