hellenismo:Δευτέρα Ἱσταμένου, II day From today’s sunset: second day of Hekatombaion. The second day
hellenismo:Δευτέρα Ἱσταμένου, II day From today’s sunset: second day of Hekatombaion. The second day is always sacred to the Agathos Daimon, to all the Heroes and Heroines and to the Chthonian Deities. It is also a day sacred to Poseidon. (Two sacred serpents. Detail of a fresco from Pompeii, 1st CE.) -- source link