Hard Rock, of course, spent its first 26 years as Trump Taj Mahal Casino-Resort which, when it opened in April 1990, was the world’s largest, most glittering casino-hotel complex. But their back stories and current positions in the local gambling realm make the shared birthdays all the more significant, for both properties rose from the wreckage of failed operations. That two casinos would arrive at such an important date simultaneously is certainly noteworthy. That’s the day both Hard Rock Hotel & Casino Atlantic City and Ocean Casino-Resort celebrate their fifth anniversaries. June 28 marked a particularly significant milestone in Atlantic City’s legal-gaming era.