I've been holding on to this word, someday, so hard that my knuckles start to get numb.

There are only seven days in a week—and someday isn't one of them.

Someday. That's a dangerous word. It's really just a code for 'never'.
(Knight and Day)

Someday I will understand
In God's whole plan
And what he's done to me
(Britney Spears)

Or not.