Yes, We Have Halloween in Ireland
We had it before you.
Once upon a time Halloween in Ireland was a bit like this.
We did, and still do, what you call ‘trick-or-treating’ but we called ‘trick-or-treating’ something else (Though, with the increasing Americanisation of the holiday, we’re increasingly dropping our terms for yours).
Take my Halloween in Ireland Quiz for a flavour of a certain time.
And this is how you pronounce Samhain