yes u can. but strongly recommend buy the ticket on the web.
No! Pre-bought/online tickets are for a specific day which is why they are discounted.. That being said if you cannot make it on that day they will not change it for you. At the gate you can only purchase anytime tickets and they cost $139. Universal summer hours start June 22nd and that's from 9 a.m. to 10 p.m..
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