Lest you think this is an entire free month for the game, there are more restrictions in place. Former players can log in at any point during the campaign and enjoy four days’ worth of access to the game, meaning that it’s not tied to a single four-day period but still lasts for just four days. Accounts used to log in also need to have been inactive for at least 30 days before being eligible. So you can’t hop in if your subscription just ran out, but if you’ve been away from the game for a little while you could take a step back in to say hello.
Source: Official Site; thanks to Darkstar for the tip!
