Transfer RD Notification Fall 2020

I’m a transfer student currently applying for UMD. I missed the EA deadline and made the regular decision deadline. I called the UMD office asking for when they would release decisions and they said they would starting mid-July. I was wondering, does anyone have information on dates that they released RD decisions in the past? In addition, are all the RD released simultaneously, or are decisions rolling? Thanks in advance.

I called on July 15th as was wondering when I will be getting my decision and was told that some decisions have gone out, some still pending.