Please help!!! What does the time 3:33 am mean?

Ok so the other day my dad and I were talking about how we ALWAYS (sometimes like 4 nights in a row) will wake up at EXACTLY 3:33 am for no apparent reason. Like, well wake up, look at the clock, go back to sleep. Well now were watching the movie The Fourth Kind (includes real clips from alien abductions) and we noticed that everything keeps happening at 3:33 am. Were kinda freaked out. What does this time mean and why do we always wake up? PLEASE HELP