# \$1year
<a name="year"></a>

The `$year` operator in Amazon DocumentDB extracts the year component from a date or timestamp.

**Parameters**
+ `expression`: The date or timestamp expression from which to extract the year component.

## Example (MongoDB Shell)
<a name="year-examples"></a>

The following example demonstrates how to use the `$year` operator to extract the year component from a date field.

**Create sample documents**

```
db.events.insertMany([
  { "_id": 1, "date": ISODate("2023-04-15T00:00:00Z") },
  { "_id": 3, "date": ISODate("2021-12-31T00:00:00Z") }
]);
```

**Query example**

```
db.events.aggregate([
  { $project: { year: { $year: "$date" } } }
]);
```

**Output**

```
[
  { "_id": 1, "year": 2023 },
  { "_id": 3, "year": 2021 }
]
```

## Code examples
<a name="year-code"></a>

To view a code example for using the `$year` command, choose the tab for the language that you want to use:

------
#### [ Node.js ]

```
const { MongoClient } = require('mongodb');

async function example() {
  const client = await MongoClient.connect('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false');
  const db = client.db('test');
  const collection = db.collection('events');

  const result = await collection.aggregate([
    { $project: { year: { $year: "$date" } } }
  ]).toArray();

  console.log(result);

  await client.close();
}

example();
```

------
#### [ Python ]

```
from pymongo import MongoClient

def example():
    client = MongoClient('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false')
    db = client['test']
    collection = db['events']

    result = list(collection.aggregate([
        {'$project': {'year': {'$year': '$date'}}}
    ]))

    print(result)

    client.close()

example()
```

------