Fetch month, day, year, etc. from ISODate in MongoDB?

The mongo shell provides various methods like ISODate() to return the date, either as a string or as a Date object. ISODate() constructor returns a Date object using the ISODate() wrapper.

Let us create a collection with documents −

> db.demo548.insertOne({"dueDate":new ISODate("2020-04-09 12:12:40")});{    "acknowledged" : true,    "insertedId" : ObjectId("5e8e30499e5f92834d7f05de") }

Display all documents from a collection with the help of find() method −

> db.demo548.find();

This will produce the following output −

{ "_id" : ObjectId("5e8e30499e5f92834d7f05de"), "dueDate" : ISODate("2020-04- 09T12:12:40Z") }

Following is the query to display, month, day, week, year, etc. from ISODate −

> db.demo548.aggregate( [ { $project: { Year: { $year: "$dueDate" }, Month: { $month: "$dueDate" }, Day: { $dayOfMonth: "$dueDate" }, Hour: { $hour: "$dueDate" }, Minutes: { $minute: "$dueDate" }, Seconds: { $second: "$dueDate" }, Milliseconds: { $millisecond: "$dueDate" }, DayOfYear: { $dayOfYear: "$dueDate" }, DayOfWeek: { $dayOfWeek: "$dueDate" }, Week: { $week: "$dueDate" } } } ] ).pretty();

This will produce the following output −

{    "_id" : ObjectId("5e8e30499e5f92834d7f05de"),    "Year" : 2020,    "Month" : 4,    "Day" : 9,    "Hour" : 12,    "Minutes" : 12,    "Seconds" : 40,    "Milliseconds" : 0,    "DayOfYear" : 100,    "DayOfWeek" : 5,    "Week" : 14 }