How to pick first unique date/time from the creation date of a thing?

How I can pick the first unique date/time highlighted in bold:

Feb 19, 2021 9:47 am
Feb 19, 2021 9:42 am
Feb 18, 2021 11:50 pm
Feb 18, 2021 11:06 pm
Feb 18, 2021 9:05 pm
Feb 18, 2021 7:06 pm
Feb 18, 2021 7:04 pm

Probably this might help.
Format date as Feb 18, 2021(time not included) and then filter by unique values.

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