How do i set the day (Mon-Sun) on my ax2013 watch?

When you pull the crown out there are two positions. The first is the day/date setting position. Turn the crown one way and the date changes, the other direction the day of the week changes. Set both the day and date to yesterday. It will become evident why when you finish. Now pull the crown all the way out and notice when you turn the crown the hands move. Advance the hands to the 12 o'clock position in a clockwise direction. As you pass 12 the date may begin to change. If not then you now know that was noon and not midnight because the date only changes at midnight. If the date did not change advance the hands all the way around 12 hours. This will now be midnight and the date should begin to change. It may be almost instantaneous or may take until 12:30 or so. Continue advancing the hands to 4 o'clock. You should see between midnight and 4 the day of the week advance. Now the day/date are correct for today and the final step is to set the correct time. Remember, you are now set a 4 AM. Advance the hands to the correct time. That means if it is 3 in the afternoon, you must advance past noon to 3. You cannot go backwards. That would be 3 AM!