The icon from Goblin Fruit is reminding me that I never got round to posting about Spiritualis Fornicatio.

You really should, yeah.

is there any traditional greeting?

Dunno. My family says, "Happy Passover." I usually hear chag Pesach sameach from people who are more serious about it. And for the last couple of years, Mike has wished me gam lakh a zissen Pesakh, which is Hebrew-Yiddish for a sweet Pesach to you, but that's just him.