People may 'one day' [='someday'] be able to take vacations to the moon.
She hopes to publish her novel 'someday'.
Let's have lunch 'someday' next week.
(..) I told you that. You got a problem? Get the chair. Sit down. I was thinking. If something happens to me someday- Hey, Leon, nothing's gonna happen to you. You're indestructible. Bullets slide off you. You play with 'em. Tony, I thought about my money. (..)1994 Léon: The Professional
(..) I've been working a long time... and I haven't done anything with my money. I thought maybe someday I could use it. You met a woman. You gotta be careful with women. Remember when you arrived in this country? (..)1994 Léon: The Professional