No, you must get all your segments in by Dec 31st this year. You are confusing the current Medallion program year which runs through Feb 2015, with the Medallion earnings year which always corresponds to the calendar year.

The extra grace months (only 1 month starting next prorgram year) in the program year is to allow end of year miles/segments to post and people to clear up account discrepancies while continuing to maintain their status.