Microsoft has updated their Product Lifecycles page, and on it the company has placed a 2014 end-date for “Mainstream Support” of its Windows Phone 8 and 7.8 releases.

Windows Phone 8 will be supported with security and other kinds of updates until July 8th, 2014 while Windows Phone 7.8 devices will continue to receive updates a little longer until September 9th. Those dates mean that both releases would have been supported for a total of 18 months after they began making an appearance on devices.

Microsoft is expected to release the next major upgrade to Windows Phone this holiday season, and much like its desktop counterpart, is codenamed Windows Phone Blue. While the company made no mention of upgradeability when updating their product lifecycle info, this is most likely because it will be announced along with the next major version.

And unless Microsoft again makes significant changes to the operating system’s kernel, expect most Windows 8 devices to be eligible for upgrade to Windows Phone Blue.

[via The Verge]