Starting with Drupal 8.0.0, Drupal core releases will move to a new release cycle schedule.
Drupal 6 support will be dropped three months after 8.0.0 is released.
Patch releases (8.0.1, 8.0.2 etc.) will have a monthly release window.
Minor releases (8.1.0, 8.2.0) will be released every six months.
The final minor release in the 8.x series will be an LTS release. This will be supported until the next major version's LTS release, + 3 months.