if we have date f.e. '2006.10.30'
we can easily check it with
/\d+\.\d+\.\d+/
or
/^(([1-9]|1[1,2]]).([1-9]|1[0-9]|2[0-9]|3[0,1]))$/
etc..
but those are minimal checks,
some months have 28..31, and every 4 years 02.28 becomes 02.29
so my question is "is there any ultimate date check regexp,
how would it look like" (i didn't manage to find one)
thanks for your time.
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