Database
[{"_id":1,"student":"John","attendance_code":1,"date":ISODate("2022-01-01T08:15:39.736Z")},{"_id":2,"student":"Peter","attendance_code":1,"date":ISODate("2022-01-02T08:15:39.736Z")},{"_id":3,"student":"Daniel","attendance_code":1,"date":ISODate("2022-01-10T08:15:39.736Z")},{"_id":4,"student":"Rick","attendance_code":2,"date":ISODate("2022-01-11T08:15:39.736Z")}]
Query
db.collection.aggregate([{$group:{_id:{"week":{$week:"$date"},"year":{$year:"$date"}}}}])