I know my model number
If you know your model number, go to www.citizenwatch.com and search or browse for your model. When you're on the product page, the setting instructions are listed at the bottom of the "features" section.
I don't know my model number
If you don't know your model number, you can find the setting instructions after identifying your movement caliber on your caseback.
To locate the Movement Caliber Number on your watch's caseback, see the diagrams below. The movement caliber number typically comprises four digits, starting with a letter (e.g. E870).
Once you have identified the movement caliber, click here and enter it in the area provided to access the setting instructions for your particular watch.