When in Greece, behave like a Greek and wish everyone “Kalo Mina” on the first day of every month. Καλό Μήνα is simple to pronounce and means “have a good month.”
Locals, especially the elderly, keep the tradition and wish to family members, friends and neighbors a “good month.”
However, they never add the name of the month at the end of “Kalo Mina.”
Another Greek tradition is to wish also “Kali Evdomada” – Good Week – on Mondays. The wish is used mostly on Monday morning, though.
They also wish “Kalo heimona” – Good Winter – preferably after August 15, when the summer vacations end – or used to end – for the majority of Greeks.
Some also wish “Kalo Fthinoporo” – Good Autumn – and “Kalo Kalokairi” – Good Summer -.
But they never wish “Good Spring…”
In this sense: Kalo Mina (October) to everyone.