Database
[{"_id":"5f2a7feae0c4e10017308fe5","events":[{"_id":"5f2a802ce0c4e10017308fe8","end":{"dateTime":"2020-08-05T23:46:00.000Z"},"start":{"dateTime":"2020-08-05T22:46:00.000Z"}}]}]
Query
db.collection.aggregate([{$match:{"events.start.dateTime":{$gte:"2020-08-04T23:46:00.000Z",$lt:"2020-08-06T23:46:00.000Z"}}}])