Do I report on assignment report date or Reception start date to new duty station?

These are questions you should be asking your Career Counselor. Your CC is the ONLY point of contact for reclass questions. Anyone else is likely to give you bad or out of date information.

You report on your report date

PFC Daniel,
Prior information given, was for if your home on leave. However, if your still at your current duty station, get with your S1 Personnel for a clear/concise interpretation okay.

PFC Daniel,
Please get the # at the location you're going to and personally make contact with them, if you do not know how to make contact with them, go to your recruiter office and use their lines, they are free and they will assist you in getting the number. "Do Not, I Repeat Do Not miss any dates", do this ASAP!
Good Luck on your journey :-) . Remember to get the name of the person your speaking with over
the phone okay!

Your losing command will issue printed reassignment orders in due course with a specific reporting date. Comply with those orders.