Rafael Dulfer [off-list ref] writes:
like. "`--date=default` is the default format. It is a custom format
based on rfc2822".
But the thing is it is *not* custom based on rfc2822. The default
format came first, 2822 much later. If I have to guess (and I
shouldn't because I was around back when we invented that format,
but I am lazy and my recollecion hazy), it came straight from the
result of ctime() but with timezone info appended at the end.