Jive actually does this with their emails. I think they add the information to the message footer. I remember finding out dates for JiveWorld this way the first year I was in my current role. And glad you mentioned it, because this is a great way for us to spread the world for our Jive5 upgrade (when the time comes)!
Great! Thanks for letting me know - do you know if you're able to tailor fit the footer to change based on the member's location or what group they might be receiving the email notifications from? I thought if there was it must be in the admin console...somewhere
I was able to see this working in action when your email notification from this post you replied to