How do i get the stock clock/weather back on my Galaxy S3?

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http://forums.androidcentral.com – I'm aware this is probably a dumb question but I need some help. I've had that stock clock/weather reporter on my S3 home screen since I bought the phone. I'm not sure if I did something or if it did it on its own but that clock is gone. I've tried turning my phone off and restarting it but it won't reappear. I don't want to to a factory reset and lose all my info in the phone & I don't want another clock, I'd like to stick with the stock one. Can someone give me a very simple step by step to get it back? (HowTos)