A few hundred emails and yes it would be a grind to do that manually. As parsing the email with a script seemed out of reach I thought within the tools in reach. Upon looking for automation I found: Rename .eml File With Email's Date and Sender With KM and Extract Date and Time from Apple Mail.
These will be nice to chew on over the Holidays and are just the right amount of stretch for me to learn a bit from.
Thanks for the nudge your objection to repetition provided. Hearing it from another was just what I needed.
Having community here is really all I want for Christmas. Thank you all! 
