PlayStation Announced Free Multiplayer Weekend on there official Blog written by James Hallahan so starting on the 17th you can enjoy FREE Multiplayer ALL Week til the 23rd without a PS Plus subscription
PlayStation Had this to say
Starting this Friday, February 17, you, your friends, your next door neighbor — everyone — will be able to access the online multiplayer modes in any PS4 game that you own without a PlayStation Plus subscription.
Free online multiplayer access begins February 17 at 12:01 AM Pacific and runs to Sunday, February 23 at 11:59 PM Pacific. Hop on to PSN during the free week with your favorite multiplayer game — no membership commitment is required during this period.