Add support for getting day of the week to time module

components/time/time_manager.h

@@ -17,6 +17,16 @@ typedef struct {
 	unsigned day;
 } Date;
 
+typedef enum {
+	WEEK_DAY_MONDAY,
+	WEEK_DAY_TUESDAY,
+	WEEK_DAY_WEDNESDAY,
+	WEEK_DAY_THURSDAY,
+	WEEK_DAY_FRIDAY,
+	WEEK_DAY_SATURDAY,
+	WEEK_DAY_SUNDAY,
+} WeekDay;
+
 /**
  * Initialize the time module.
  */
@@ -42,4 +52,14 @@ Date get_date(void);
  */
 void set_date(Date date);
 
+/**
+ * Get which day of the week it is.
+ */
+WeekDay get_week_day(void);
+
+/**
+ * Get the name of a day of the week.
+ */
+const char *week_day_name(WeekDay day);
+
 #endif