sortm error analysis

[Dave Close]

Running sortm on a folder with about 6000 messages, sortm reports "can't
parse date field" on two messages. I've added -verbose but have no clue
to what is wrong with the date field on those messages. Here is what the
messages contain. There are no hidden characters or trailing whitespace.

  Date: Wed, 21 Sep 2022 06:47:55 -0400
  Date: Wed, 21 Sep 2022 03:49:19 -0700

Can you see a problem with these dates? If not, how can I figure out
the cause of sortm's complaint?
-- 
         Dave Close, Compata, Irvine CA       +1 714 434 7359
       dave@compata.com              dhclose@alumni.caltech.edu
       "Political campaigns are the graveyard of real ideas and
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