Wordnet 3.0
NOUN (1)
1. 
 the middle part of February; 
The Collaborative International Dictionary of English v.0.48:
mid-February \mid-February\ n.
   the middle part of February.
   [WordNet 1.5]
WordNet (r) 3.0 (2006):
mid-February
    n 1: the middle part of February