Twitter announced it will start rolling out the new protocol in October. All new links wrapped in its t.co wrapper will automatically use HTTPS by default starting Oct. 1. Old links will not be affected and the length of the wrapper will be increased by a single character. The U.S. government has set a 2016 end date for HTTP on all its public websites and Web services. Soon enough, companies will have two choices: Get on board with the protocol or get off the Internet.”]
Source: https://securityintelligence.com/news/tweets-and-turns-https-goes-live-for-twitters-t-co-in-october/