Riddle of the Day

[Gizmokid2005]

I never was, am always to be,
No one ever saw me, nor ever will
And yet I am the confidence of all
To live and breathe on this terrestrial ball.
What am I?

Now that I'm back....

ANSWER (Congrats TL and Hey): Tomorrow.

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NEXT RIDDLE:

I reside in a container or can,
You can see and feel me,
I am weightless, colorless, and odorless.
What am I?