Hi Ludo,

On Sun, 09 Jul 2017 21:51:08 +0200
ludo@gnu.org (Ludovic Courtès) wrote:
> Debian has a SOURCE_DATE_EPOCH patch:
> 
>   http://sources.debian.net/patches/groff/1.22.3-9/source-date-epoch.patch/
> 
> Perhaps we could just use that?  That way, the default behavior of groff
> would remained unchanged.

Yeah, it seems to work fine.

Apparently git send-email doesn't work for me right now.

So I attached the patch manually here...