That Messenger will be subsumed into the Skype product is old news. Today, Microsoft detailed the calendar by which the company will shift the tens of millions of Messneger users to the communications platform that it spent north of $6 billion to acquire.

Microsoft declined to be more specific on the userbase of Messenger. However, it is more than willing to be explicit on just how large Skype has grown: it now has more has more than 280 million “monthly active users.”

The software giant will commence moving the Messenger userbase to Skype, sans the ability to say no, on April 8th. Clients that are English-based are up first for migration. The process will conclude with the what the firm described as “Brazilian Portuguese” on April 30th at the earliest.