As opposed to a canning date? They put a canning date on the bottom of the can. If you're wondering when it was brewed, I'd say scroll through their Facebook and/or Twittter and there's probably pictures and something saying "we're making Ten Fidy today!"
Same. Last three years all have standard DD/MM/YYYY timestamp on the bottom. Also have a short line like, "TGI Fidy" as well. Lovely beer.
Time stamp on the bottom. They also put fun sayings on the bottom. This changes each run depending on who is running the machine. Fun little fact I learned when I took the tour a few weeks ago.