# Create test collection
db.test2.insert({"_dt": new Date()})

# This query returns no results
db.test2.aggregate([{"$match": {"_dt": {"$gt": {"$date": 0}}}}])
# This query returns no results
db.test2.aggregate([{"$match": {"_dt": {"$gt": {"$date": "2015-11-26T00:00:00Z"}}}}])
# This query returns results
db.test2.aggregate([{"$match": {"_dt": {"$gt": new Date(0)}}}])
# This query returns results
db.test2.aggregate([{"$match": {"_dt": {"$gt": new Date("2015-11-26T00:00:00Z")}}}])