Database
[{"myUpdateTime":"2021-11-08T17:42:30.650Z"},{"myUpdateTime":"2022-11-08T17:42:30.650Z"},{"myUpdateTime":"2023-11-08T17:42:30.650Z"}]
Query
db.collection.aggregate([{$group:{_id:null,minUpdateTime:{$min:{$toDate:"$myUpdateTime"}},maxUpdateTime:{$max:{$toDate:"$myUpdateTime"}}}}])