Database

[{name:"Thai Restaurant",location:"London",notOpenOnDays:["Monday","Thursday"],entryFee:"$5",rating:"3",},{name:"Indian.com",location:"Broughton",notOpenOnDays:["Wednesday"],entryFee:"$0",rating:"4",},{name:"23rd Street Pizza",location:"Fallowfield",notOpenOnDays:["Sunday"],entryFee:"$2",rating:"4",},{name:"7 STAR Pizza",location:"Newcastle",notOpenOnDays:["Saturday","Sunday"],entryFee:"$10",rating:"2",},{name:"A Cake A Shake",location:"London",notOpenOnDays:["Monday"],entryFee:"$1",rating:"4",}]

Query

db.collection.aggregate([{$project:{_id:0,closedOn:"$notOpenOnDays"}}])

Result