Improve format of workout start date on overview page

app.py

@@ -204,13 +204,18 @@ def get_workouts_for_user(user_id):
             workouts_data.append({
                 'id': workout.id,
                 'user_id': user_id,
-                'start_time': start_time.strftime('%Y-%m-%d %H:%M:%S'),
+                'start_time': format_date_with_ordinal(start_time, '%H:%M %B %dth %Y'),
                 'duration': format_duration(duration),
                 'average_rpm': int(average_rpm)
             })
     return workouts_data
 
 
+def format_date_with_ordinal(d, format_string):
+    ordinal = {'1': 'st', '2': 'nd', '3': 'rd'}.get(str(d.day)[-1:], 'th')
+    return d.strftime(format_string).replace('{th}', ordinal)
+
+
 def format_duration(duration):
     hours, remainder = divmod(duration.seconds, 3600)
     minutes, _ = divmod(remainder, 60)