Liddell–Scott–Jones: Πῠᾰνοψιών

Πῠᾰνοψιών,ῶνος,ὁ, the fourth month of the Att. year, named from the festivalΠυανόψια, corresponding to the latter part of October and former of November, IG 12.6.64 , 22.1014.4 , etc.; also at Priene, Miletus, etc., SIG 282.19

(iv B.C.), 588.90

(ii B.C.), etc.: freq. writtenΠυανεψιών, Thphr. HP 4.2.10 , etc.; but not in Att. Inscrr. (exc.Ποιανεψιών

IG 22.2239.82

(iii A.D.)); cf.Κυανοψιών.