That voter date is totally unnecessary. Receiving the ballot on time is the right way to go.
This is an incorrect repeat of your previous posts.
The date and signature on the outside envelope (not on the ballot as everyone is stating) relate to the legal statement you are signing under penalty of pejury, with name, date, location, found on all legal documents.
Failure to provide a legal statement of authentication makes that envelope, and its enclosed ballot, UNLAWFUL. Retaining the ballot and adding its contents to the election at hand makes that election UNLAWFUL, and indeterminate as that ballot cannot be removed once it is separated from its envelope and statement of identity.