Renault RS.17: Feb 21 location TBD (read somewhere that it will be in London)
Force India VJM09: Feb 22 at Silverstone
Sauber C36: Feb 22 at Barcelona
Mercedes W08: Feb 23 at Silverstone
Ferrari (?): Feb 24 at Fiorano
Mclaren MCL32: Feb 24 at Woking
Toro Rosso STR12: Feb 26 at Barcelona
Red Bull R13: Feb 26 location TBD
also Sauber will reveal images of their new car a few days prior to their on track launch (feb 20).