Kevin -

There is no disclosed method for getting a timestamp onto the records
of client-initiated backups.  You might instead consider using a
scheduled backup in conjunction with the PRESchedulecmd and
POSTSchedulecmd options, where the former can do setup (including any
timing waits), and the latter can be used to uniquely name the day's
log, and possibly generate statistics from it.  Many of us use this
technique successfully.

   Richard Sims   at Boston University