The sliding crown guard has 3 positions:
1 “In” position = Normal position when wearing the watch and winding crown.
2 Intermediate position = Slide the crown guard to the first notch and turn the crown to the correct date. Slide the crown guard back against the case when finished.
3 “Out” position = Fully slide the crown guard out and turn the crown to the correct time. The minutes can be adjusted both clockwise and anticlockwise. Slide the crown guard back against the case when finished.
Your watch is equipped with an automatic movement. If it has stopped, check that the slide is fully in (position 1) and wind the crown a few turns.
To adjust the moon phase, gently position the supplied tool in the corrector hole, which is located on the left-hand side of the case. To avoid damaging the moon phase gear train, do not adjust the moon phase between 9 pm and 2 am.
1 - Remove the screw on the right-hand lug by turning anticlockwise with the supplied screwdriver. 
2 - Remove the screw on the left-hand lug by turning anticlockwise with the supplied screwdriver. 
3 - Push the central pin out from between the strap and the lugs and remove the strap. Repeat steps 1-3 on the other side of the case. 
4 - Place the new strap between the lugs and slide the central pin through lugs and strap.Screw-in the right-hand screw in the lug by turning the screwdriver in a clockwise direction.
5 - Screw-in the left-hand screw in the lug by turning the screwdriver in a clockwise direction. Repeat steps 1-3 on the other side of the case.