Time output format

[Jeff Sadowski]

when I run something like so
"cat test.email |gpg"
where test.email is an email that was signed I get output like so

<--- begin
The verified signed text
...
gpg: Signature made <3 letter Day of Week> <Day of Month> <3 letter
Month> <year> <time> <AM/PM> <time zone> using DSA key ID <DSA key ID>
gpg: <Good|Bad?> signature from "<key sender>"
Primary key fingerprint: <Key fingerprint>
<--- end

Is there an option to change the format of the time?
While reading the manual I could not find it.

I'd like it in a time stamp format so its easy to compare against current time.
Or is there an option to validate that the text was signed within xx hours?