From the title page:
Rage of Demons Edition: July 23, 2015 to March 15, 2016
From the How to Use This Guide section:
The D&D Adventurers League Player’s Guide is a comprehensive guide to all the rules used for official games. In addition to player-focused rules, it contains important information for Dungeon Masters and organizers. It contains special rules for playing Dungeons & Dragons in the official campaign.