diff --git a/dsl-template/src/commonMain/kotlin/aggregation/AggregationOperators.kt b/dsl-template/src/commonMain/kotlin/aggregation/AggregationOperators.kt
index a77bae82..58aa1c42 100644
--- a/dsl-template/src/commonMain/kotlin/aggregation/AggregationOperators.kt
+++ b/dsl-template/src/commonMain/kotlin/aggregation/AggregationOperators.kt
@@ -137,6 +137,7 @@ import opensavvy.ktmongo.dsl.query.FilterQuery
  * - [`$toUUID`][TypeValueOperators.toUuid]
  *
  * Date and time operators:
+ * - [`$millisecond`][DateTimeValueOperators.millisecond]
  * - [`$minute`][DateTimeValueOperators.minute]
  * - [`$month`][DateTimeValueOperators.month]
  * - [`$second`][DateTimeValueOperators.second]
diff --git a/dsl-template/src/commonMain/kotlin/aggregation/operators/DateTimeValueOperators.kt b/dsl-template/src/commonMain/kotlin/aggregation/operators/DateTimeValueOperators.kt
index ee4a1acd..6e27eab3 100644
--- a/dsl-template/src/commonMain/kotlin/aggregation/operators/DateTimeValueOperators.kt
+++ b/dsl-template/src/commonMain/kotlin/aggregation/operators/DateTimeValueOperators.kt
@@ -514,6 +514,100 @@ interface DateTimeValueOperators : ValueOperators {
 	final val <R : Any> Value<R, Timestamp>.minute: Value<R, Int>
 		get() = UnaryOperator(context, "minute", this)
 
+	// endregion
+	// region $millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	val <R : Any> Value<R, Instant>.millisecond: Value<R, Int>
+		get() = UnaryOperator(context, "millisecond", this)
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	@Suppress("WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfObjectId")
+	final val <R : Any> Value<R, ObjectId>.millisecond: Value<R, Int>
+		get() = UnaryOperator(context, "millisecond", this)
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	@Suppress("WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfTimestamp")
+	final val <R : Any> Value<R, Timestamp>.millisecond: Value<R, Int>
+		get() = UnaryOperator(context, "millisecond", this)
+
 	// endregion
 
 	@LowLevelApi
diff --git a/dsl/src/commonMain/kotlin/aggregation/AggregationOperators.kt b/dsl/src/commonMain/kotlin/aggregation/AggregationOperators.kt
index 100350af..26c71e7e 100644
--- a/dsl/src/commonMain/kotlin/aggregation/AggregationOperators.kt
+++ b/dsl/src/commonMain/kotlin/aggregation/AggregationOperators.kt
@@ -140,6 +140,7 @@ import opensavvy.ktmongo.dsl.query.FilterQuery
  * - [`$toUUID`][TypeValueOperators.toUuid]
  *
  * Date and time operators:
+ * - [`$millisecond`][DateTimeValueOperators.millisecond]
  * - [`$minute`][DateTimeValueOperators.minute]
  * - [`$month`][DateTimeValueOperators.month]
  * - [`$second`][DateTimeValueOperators.second]
diff --git a/dsl/src/commonMain/kotlin/aggregation/operators/DateTimeValueOperators.kt b/dsl/src/commonMain/kotlin/aggregation/operators/DateTimeValueOperators.kt
index 2260b0d6..f7218305 100644
--- a/dsl/src/commonMain/kotlin/aggregation/operators/DateTimeValueOperators.kt
+++ b/dsl/src/commonMain/kotlin/aggregation/operators/DateTimeValueOperators.kt
@@ -1929,6 +1929,377 @@ interface DateTimeValueOperators : ValueOperators {
 	final val Timestamp.minute: Value<Any, Int>
 		get() = of(this).minute
 
+	// endregion
+	// region $millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	val <R : Any> Value<R, Instant>.millisecond: Value<R, Int>
+		get() = UnaryOperator(context, "millisecond", this)
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	val <R : Any> opensavvy.ktmongo.dsl.path.Field<R, Instant>.millisecond: Value<R, Int>
+		get() = of(this).millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	val <R : Any> kotlin.reflect.KProperty1<R, Instant>.millisecond: Value<R, Int>
+		get() = of(this).millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@kotlin.internal.LowPriorityInOverloadResolution
+	@Suppress("INVISIBLE_REFERENCE")
+	@OptIn(LowLevelApi::class)
+	val Instant.millisecond: Value<Any, Int>
+		get() = of(this).millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	@Suppress("WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfObjectId")
+	final val <R : Any> Value<R, ObjectId>.millisecond: Value<R, Int>
+		get() = UnaryOperator(context, "millisecond", this)
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	@Suppress("WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfObjectId")
+	final val <R : Any> opensavvy.ktmongo.dsl.path.Field<R, ObjectId>.millisecond: Value<R, Int>
+		get() = of(this).millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	@Suppress("WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfObjectId")
+	final val <R : Any> kotlin.reflect.KProperty1<R, ObjectId>.millisecond: Value<R, Int>
+		get() = of(this).millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@kotlin.internal.LowPriorityInOverloadResolution
+	@OptIn(LowLevelApi::class)
+	@Suppress("INVISIBLE_REFERENCE", "WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfObjectId")
+	final val ObjectId.millisecond: Value<Any, Int>
+		get() = of(this).millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	@Suppress("WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfTimestamp")
+	final val <R : Any> Value<R, Timestamp>.millisecond: Value<R, Int>
+		get() = UnaryOperator(context, "millisecond", this)
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	@Suppress("WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfTimestamp")
+	final val <R : Any> opensavvy.ktmongo.dsl.path.Field<R, Timestamp>.millisecond: Value<R, Int>
+		get() = of(this).millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@OptIn(LowLevelApi::class)
+	@Suppress("WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfTimestamp")
+	final val <R : Any> kotlin.reflect.KProperty1<R, Timestamp>.millisecond: Value<R, Int>
+		get() = of(this).millisecond
+
+	/**
+	 * Returns the millisecond portion of a date as a number between `0` and `999`.
+	 *
+	 * The accepted date types are [Instant], [ObjectId] and [Timestamp].
+	 *
+	 * ### Example
+	 *
+	 * ```kotlin
+	 * class User(
+	 *     val name: String,
+	 *     val birthdate: Instant,
+	 *     val birthmillisecond: Int? = null,
+	 * )
+	 *
+	 * users.updateManyWithPipeline {
+	 *     set {
+	 *         User::birthmillisecond set User::birthdate.millisecond
+	 *     }
+	 * }
+	 * ```
+	 *
+	 * ### External resources
+	 *
+	 * - [Official documentation](https://www.mongodb.com/docs/manual/reference/operator/aggregation/millisecond/)
+	 */
+	@kotlin.internal.LowPriorityInOverloadResolution
+	@OptIn(LowLevelApi::class)
+	@Suppress("INVISIBLE_REFERENCE", "WRONG_MODIFIER_CONTAINING_DECLARATION")
+	@get:JvmName("millisecondOfTimestamp")
+	final val Timestamp.millisecond: Value<Any, Int>
+		get() = of(this).millisecond
+
 	// endregion
 
 	@LowLevelApi
diff --git a/dsl/src/commonTest/kotlin/aggregation/operators/DateTimeValueOperatorsTest.kt b/dsl/src/commonTest/kotlin/aggregation/operators/DateTimeValueOperatorsTest.kt
index 182fe416..eea65d8f 100644
--- a/dsl/src/commonTest/kotlin/aggregation/operators/DateTimeValueOperatorsTest.kt
+++ b/dsl/src/commonTest/kotlin/aggregation/operators/DateTimeValueOperatorsTest.kt
@@ -30,6 +30,7 @@ val DateTimeValueOperatorsTest by multiContextSuite {
 		val second: Int,
 		val month: Int,
 		val minute: Int,
+		val millisecond: Int,
 	)
 
 	test($$"$year") {
@@ -122,4 +123,22 @@ val DateTimeValueOperatorsTest by multiContextSuite {
 			""".trimIndent())
 	}
 
+	test($$"$millisecond") {
+		TestPipeline<Target>()
+			.set {
+				Target::millisecond set Target::date.millisecond
+			}
+			.shouldBeBson($$"""
+				[
+					{
+						"$set": {
+							"millisecond": {
+								"$millisecond": "$date"
+							}
+						}
+					}
+				]
+			""".trimIndent())
+	}
+
 }