Deferring Big 4 Start Date

By | March 21, 2017

I interned last summer, 2016, at a Big 4 firm and was offered full time beginning in summer 2017. We have not heard on start dates yet, so I was curious as to whether or not I could defer my start date until January. Will even asking them about this come off as ungrateful, or are they understanding to a changed start date?

Thank you