List of constants in time.inc

enum 
{
    timeunit_seconds = 0,
    timeunit_minutes,
    timeunit_hours,
    timeunit_days,
    timeunit_weeks,
};

#define SECONDS_IN_MINUTE 60
#define SECONDS_IN_HOUR   3600
#define SECONDS_IN_DAY    86400
#define SECONDS_IN_WEEK   604800