¿Fecha de nacimiento?

I was talking with a customer at work today and I needed to know his birthday so I said ¿Tu cumpleaños? and he said no it would be ¿fecha de nacimiento? He said people don’t say cumpleaños and I had never heard of that. It sounds like they would be synonymous in English.

Does anyone know his reasoning behind this or if it’s a common thing?

submitted by /u/NoDentureAdventure
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