Floating Holidays

Does anyone know how to translate "floating holidays"? Are they "feriados movibles"?

To be honest, I've never heard anyone using the term "días feriados movibles", yet it sounds very logical and self-explanatory. I would go ahead a use that term. ;)

I agree with Hebe. I think your translation is highly acceptable!

Thanks so much to both!

floating holidays

día feriado de fecha optativa