May 1st deposit deadline

I am a transfer student and was admitted by Umich. The deposit deadline for Umich is May 1st but some universities are updating decisions exactly on May 1st. So I want know when Umich is talking about May 01 as the deposit deadline, does it mean Apr 30 11:59pm or May 01 11:59pm?

Why don’t you call their admissions office and check?