Procmail -f cron does not have a date header - how to add

This is on Fedora32 which ships without an MTA, and I don't want to add one.  Procmail may be ok... So I am experimenting with using procmail directly for cron output. My crontabargs is: CRONDARGS=-m "/usr/bin/procmail -f cron" But since cronie is not putting a DATE header in its output, there is no DATE header in my local mail spool. I have dug around a bit and can't seem to find a way for procmail to add a DATE header. How may I do this? thanks