The New Samsung Galaxy S7 is in the rumor mill purporting many times that the handset will launch earlier than its predecessor launch time. Very recently another rumor has confirmed this disposition.If we see the launch time of Galaxy S6 pair, it was March 1^st, 2015. And for Galaxy S7 it is rumored to be 21^st February, 2015. So as matter of fact, it will launch earlier but only 8 days early.

New rumor claims Galaxy S7 to debut on February 21

Also the new timing is quite in line with the MWC, World Mobile Conference, which will held next year in Barcelona starting from February 22, 2016. Last year it started from March 2, 2015 so you can see the pattern of Samsung.

Most of the Intel comes from tipster that has been accurate many times for rumors. So obviously, you cannot take it for granted or specifically unless Sammy announce an official event date through its sources.