Hi Tara, as long as the starter shows no signs of mold or a pink or orange hue/streak, you could certainly try to revive it, although we generally recommend feeding it soon after it arrives. A starter that has been stored in the refrigerator for that long may take 3-4 days of twice a day feedings at room temperature to get it nice and active again.  Here's our Sourdough Booklet, and you can also read more about or recommended sourdough maintenance routine here. Don't worry too much if the starter doesn't do much after that first 24 hour feeding, as it will start out quite sluggish. Once your starter is doubling in volume about 6-8 hours after a feeding and has a pleasant aroma, then you're good to go! 

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