How to skip 'empty' lines (timestamp plus TAB)

I have lines such as:

2024-02-12 11:24:43	

and try:

[…] !~ `(^\t*2024-02-12 [0-9:]*\t$)

But I cannot get rid of the lines.
What do I do wrong?

  1. Try getting rid of parenthesis (no group capture).

  2. A screenshot might be helpful.

No group capture… So it should be (?:...) ?

I think I got it: the timestamp is not part of the string being filtered!
So, excluding empty lines goes by ^\s*$