What's so special about astrology? What clifies as a special astrological event?

Is seven a lucky number in astrology? I was born 12:07 am, July, 7, 1979. And seven leap years later I turned 28 on 7/7/07. Freaky eh? Though unfortunately none of my lotto tickets were winners on my birthday, so I'm not much of a believer in it. lol