Java：通过Parse.com REST API将日期对象作为JSONObject发送

I am trying to create a new object in my Parse.com database through Parse's REST API, using an HttpsUrlConnection. Their REST API only accepts JSON. I have gotten everything to work, where the database would accept the new object entry - except for when I attempt to include a Date field. When I do pass in a Date, the server rejects the object entirely.I am trying to create a new object in my Parse.