> Is there a syntax for checking the subs of a particular date?
> Something like
> query listname with 3/3/7 for *@*

Nope.

> What I want is sort of a rehash of the notifies (for a listonwer who is
> *not* the site administrator) for one day, though I'll tolerate a longer
> output, long as I can read it, via an email command.
>
> Got a highly suspicious sub to a list today, which I would like to follow
> up, but accidentally deleted the notify (I could go through all of the
> current subs, but at around 3,900 I really don't want to).

You or the owner can use:
rev listname noh by date
You'll get all subscribers listed by sub date (which is shown) newest to
the oldest.