On the Laravel News site there's an announcement posted about a change in the Laravel release schedule, an update from the original 2013 announcement.
Yesterday, Taylor announced on Twitter that this is going to be changing to a January and July cycle, pushing each release out a month from its current schedule.
This has two primary advantages for the development team and the first is it allows more time for testing after Symfony’s release. The second advantage is it’ll better coincide with Laracon, the yearly Laravel conference.
This means a bit of a delay on the release of the next major version of the framework (v5.4) but only by one month. The six month cycle will then resume after that slight delay. You can find out more about the remainder of the release cycle in the original post based on Taylor's comments at Laracon 2013.