Search Result for "mid-september": 
Wordnet 3.0

NOUN (1)

1. the middle part of September; 



The Collaborative International Dictionary of English v.0.48:

mid-September \mid-September\ n.
   the middle part of September.
   [WordNet 1.5]


WordNet (r) 3.0 (2006):

mid-September
    n 1: the middle part of September