How to insert a document with date in MongoDB?

To insert a document with date in MongoDB, use the new Date() constructor to create date values. MongoDB stores dates as ISODate objects in UTC format.

Syntax

db.collection.insertOne({
    "fieldName": new Date("YYYY-MM-DD")
});

Example

Let us create a collection with documents containing date fields ?

db.insertDocumentWithDateDemo.insertMany([
    {
        "UserName": "Larry",
        "UserMessage": "Hi",
        "UserMessagePostDate": new Date("2012-09-24")
    },
    {
        "UserName": "Chris",
        "UserMessage": "Hello", 
        "UserMessagePostDate": new Date("2015-12-31")
    },
    {
        "UserName": "Robert",
        "UserMessage": "Bye",
        "UserMessagePostDate": new Date("2019-01-01")
    }
]);

{
    "acknowledged": true,
    "insertedIds": [
        ObjectId("5c9cca58a629b87623db1b16"),
        ObjectId("5c9cca71a629b87623db1b17"),
        ObjectId("5c9cca85a629b87623db1b18")
    ]
}

Verify Result

Display all documents from the collection using find() ?

db.insertDocumentWithDateDemo.find().pretty();

{
    "_id": ObjectId("5c9cca58a629b87623db1b16"),
    "UserName": "Larry",
    "UserMessage": "Hi",
    "UserMessagePostDate": ISODate("2012-09-24T00:00:00Z")
}
{
    "_id": ObjectId("5c9cca71a629b87623db1b17"),
    "UserName": "Chris",
    "UserMessage": "Hello",
    "UserMessagePostDate": ISODate("2015-12-31T00:00:00Z")
}
{
    "_id": ObjectId("5c9cca85a629b87623db1b18"),
    "UserName": "Robert",
    "UserMessage": "Bye",
    "UserMessagePostDate": ISODate("2019-01-01T00:00:00Z")
}

Key Points

• Use new Date("YYYY-MM-DD") format for date strings
• MongoDB automatically converts dates to ISODate format in UTC
• You can also use new Date() without parameters for current timestamp

Conclusion

The new Date() constructor allows easy insertion of date fields in MongoDB documents. All dates are stored as ISODate objects in UTC format for consistency across different time zones.