typedef int day_t;
typedef int hour_t;
typedef int min_t;
+typedef int sec_t;
typedef enum {
JAN = 0,
day_t day;
hour_t hour;
min_t min;
+ sec_t sec;
} date_t;
/* Global data */
+extern date_t NOW; // current wall clock time, refreshed at 10 Hz
extern date_t SEL; // date and time the user is looking at
/* Initialize */
void date_init(void);
+void date_sync(void);
/* Time functions */
int is_leap_year(year_t year);