Travel date suggestions please

Hi

I am Praneeth I have got an admit into University at Chicago my I 20 states that the classes will begin from AUG 15 but I received a mail from the registrar that the classes will begin from 31st.Can I schedule my travel after 15th August.

Kindly help me, Thanks in advance.

You must carry letter from registrar to port of entry to explain why you are entering US later than proposed.