Valid to / Expiration date inclusive or exclusive

I have a form with a "Valid to" date field. This field represents the date in which something will expire.

Should the "Valid to" date be inclusive or exclusive? E.g. Valid to = 04.02.2020. Should it be valid until 03.02.2020 23:59:59,999? Or until 04.02.2020 23:59:59,999

Is there best practices or regulations for expiration dates wording? "Valid to", "Valid thru", "Valid until", "Expiration date" or something else...?