When to follow up on late-stage application?

[Caryatid236]

I completed my application last week for a program in Interdisciplinary Humanities. I had originally contacted them to inquire about fall 2017 but they said that they were still accepting applications for September so I decided to go for it. If this were a normal application I would just wait until April 15, but since I am so late in the game I am wondering how long I should wait to hear back? I would like to have plenty of time to notify my employer if I am leaving at the end of summer, and I would imagine that the school would also like to expedite the process (right?). The website says that my application status is currently under review and to "check back often," so should I just sit around hitting refresh or can I follow up eventually by emailing the graduate coordinator? How long should I wait? My application was complete last Monday. Thank you!