It seems that the “read me” file from The Sims 4 CAS Demo has given us a possible wordlwide release date. The date August 12, 2014 is written right below the EA copyright, and considering the date falls one day before Gamescom 2014 (also press conference day!), the date is as good as official.
Hat Tip: AznSensei
❗ Note: This presumption is based on official material released with The Sims 4 CAS Demo, and may not represent the actual release date. Officially, no worldwide release date has been set in stone.