Thank you for the quick reply! I'll subscribe myself to that.
However, when I recently authorized a domain with a new authorization token today, the authorization URI containing the details such as the identifier value, which challenges were used and each challenge's status, the authorization validation status, and authorization validity expiry etc, states the following:
"status": "valid",
"expires": "2016-12-20T08:51:55Z"
If it was 60 days, then wouldn't the above value for the "expires" key be mentioning at least 2017...?