Canonical is nice enough to publish a series of Google Calendars to the public for Ubuntu . A couple of the more interesting ones can be found at the following. Ubuntu Fridge Calendar http://fridge.ubuntu.com/calendars/ Ubuntu Release Calendar http://fridge.ubuntu.com/calendars/ubuntu-release-calendar/ The second one is of particular interest since while Canonical has made it a practice to release the next version of its OS on a rigid interval, the actual release dates aren't always easy to find. This is a nice place to find them as soon as they;re scheduled. Additionally, the following wiki page identifies the details of the current releases. Releases https://wiki.ubuntu.com/Releases
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