Welcome to allnurses!
AFAIK, every state does something like this. Every state has some kind of system for renewal of licenses designed to spread out license renewals more or less evenly over the year, typically one based on the individual nurse's birthday (e.g., your license expires on the last day of your birth month). You apply for licensure, as a new grad applying by examination or as someone applying for licensure by endorsement from another state, at whatever point during the year suits your needs. The state issues your initial license as soon as possible after you apply, and the initial license has an expiration date that will fit you into the state's ongoing renewal system (i.e., only good until your next birthday month). First licenses are typically only valid for some weird, random amount of time.
Years ago, I moved to attend graduate school. I applied for licensure in the new state as soon as I heard I was accepted to the school. (months in advance of starting school). I moved to the new state during the summer before school started, having not yet gotten my license. The BON didn't get around to issuing my license until August
(I had been hoping to already be working prn somewhere during the summer, but wasn't able to do that without a license ...) and my birthday is in September, so, when my license finally arrived, it was only good until the end of the following month
, so I had to immediately turn around and apply for renewal.
Once you renew your license in July, you'll get a license that is good for the full two years (or however long licenses are good for in MD).