My interpretation of that link you provided is that today (before close of business) is your last chance to get the divy:
Date of Record: Tuesday (2nd January)
Ex-Dividend Date: Thursday (Dec 28th)
To ensure that you are in the record books, you need to buy the stock at least three days before the date of record, which also happens to be the day before the ex-dividend date.
If you buy on the ex-dividend date (Thursday), which is only two business days before the date of record, you will not receive the dividend because your name will not appear in the company's record books until the following Tuesday. If you want to buy the stock and receive the dividend, you need to buy it today (Wednesday). But, if you want to sell the stock and still receive the dividend, you need to sell on or after Thursday the 28th.