Database
[{"bookingDate":ISODate("2022-12-17T22:00:00.000+00:00")},{"bookingDate":ISODate("2022-12-17T22:00:00.000+00:00")}]
Query
db.collection.aggregate([{$group:{_id:{$dateToString:{format:"%Y-%m-%d",date:"$bookingDate",},},totalBookings:{$sum:1,},}},{$match:{totalBookings:{$gte:4,},},},])