Bloody Birthday. Useful Facts You Learn From Horror Films, No #24131: If a child is born during a solar eclipse, they are probably going to be a murderous psychopath. That's the case in this early 80s slasher horror, also an entry in the relatively rare "killer kids" subgenre, where a fluke of birth seems to be the only motive three unrelated little brats have for going psycho around their birthday and launching a killing spree targeting schoolmates, teachers, relatives and anyone else they happen to come across. It's an entertaining and occasionally creepy bit of schlock, with some (intentionally?) funny moments. I lolled at the quick cuts from the little girl offing another family member to her fake sobbing at the latest funeral.