Bad Hair Day
A bad hair day is one of those days when nothing seems to be going right. Originated in the 1992 movie Buffy the Vampire Slayer. This was the exact lines from the film:

Buffy (Kristy Swanson) to the one-armed vampire Amilyn (Paul Reubens):
"I'm fine but you're obviously having a bad hair day."

This from a website visitor:
I don't know when Jane Pauley retired from the anchor position on the Today show,
but during their final goodbye, he referred to Jane as having had good hair days and bad hair days. This reference may predate the Buffy the Vampire Slayer reference that is now listed on your site.

(来源：英语聊天室 http://chat.EnglishCN.com)