[{"date":new Date("2022-03-01")},{"date":new Date("2022-02-01")},{"date":new Date("2022-01-01")},{"date":new Date("2021-01-01")}]

db.collection.aggregate([{$match:{$expr:{$lt:["$date",{"$dateFromParts":{"year":2022,"month":2}}]}}}])