If you know the bit you want to remove is a constant length, just chop that bit off:
print substr '3/1/2006 0:00:00', 0, -8;;
3/1/2006
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.