Hellenion's December 2015 Festival calendar,
from http://www.hellenion.org/calendar.html
Maimakterion – Poseideon
Year 3 of the 698th Olympiad
11 Dark of the moon
12 Libation to Dionysos; Hekate’s Deipnon
13 Noumenia
14 Agathos Daimon
20 Winter solstice
21 Heliogenna
22 Heliogenna
25 Full moon
29 Poseidea
31 New Year's Eve
