Without knowing more details, you might consider offering 'cash for keys,' as a way to gain possession.
Consider how much money you're gonna lose by not being able to evict for three months, and then compare that to how much you might save by bribing the occupant to move, and then offer the occupant slightly less than it would cost by waiting for the courts to open back up.
At this point, apart from hassling the occupant, and making his life a living hell, he's got little incentive to do anything, but squat there until he is forced to move. If he's paying rent, then your losses are somewhat less I would think.
If you're gonna lose three months rent anyway, why not offer your squatter two month's worth of rent to move ...if he can be out by the 15th? I would move, if you made me this offer, and I own my house!!!!!!
Cash-for-Keys is always better than risking an eviction and all the things that can go wrong going that direction.
Hope that helps a little. Good luck!