Managed to snag this card in August during the three day window. I will be staying at a Marriott resort over the NYE holiday 12/29 - 1/3. My question is about the $300 travel credit. Since I received the card in August I am slightly confused about the credit, especially since my trip is planned for the end of the year...do I have to redeem the $300 credit by 12/31/18 and then it will reset again on 1/1/19?