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I would make sure they're updated on your website (very important), facebook, and maybe BBB, but you shouldn't need to do all citations.
and the only real reason you want to update these is to prevent Google's automated system from changing them back on you all the time.
I'm sure that it goes w/o saying, but your GBP of course. In addition to what Darren already stated, I'd be sure to update your Apple Business Connect (ABC) hours along with Yelp (which often feeds ABC). Having correct hours on website will also prevent Apple from making corrections.