diff --git a/Sources/Foundation/Date.swift b/Sources/Foundation/Date.swift
index efd3e26774..f6ec9110e1 100644
--- a/Sources/Foundation/Date.swift
+++ b/Sources/Foundation/Date.swift
@@ -14,7 +14,7 @@
  
  A `Date` is independent of a particular calendar or time zone. To represent a `Date` to a user, you must interpret it in the context of a `Calendar`.
  */
-public struct Date : ReferenceConvertible, Comparable, Equatable {
+public struct Date : ReferenceConvertible, Comparable, Equatable, Sendable {
     public typealias ReferenceType = NSDate
     
     fileprivate var _time: TimeInterval
diff --git a/Sources/Foundation/DateComponents.swift b/Sources/Foundation/DateComponents.swift
index e0b20fab2e..c79baf8893 100644
--- a/Sources/Foundation/DateComponents.swift
+++ b/Sources/Foundation/DateComponents.swift
@@ -19,7 +19,7 @@
  
  When a new instance of `DateComponents` is created, the date components are set to `nil`.
  */
-public struct DateComponents : ReferenceConvertible, Hashable, Equatable, _MutableBoxing {
+public struct DateComponents : ReferenceConvertible, Hashable, Equatable, Sendable, _MutableBoxing {
     public typealias ReferenceType = NSDateComponents
     
     internal var _handle: _MutableHandle<NSDateComponents>
diff --git a/Sources/Foundation/DateInterval.swift b/Sources/Foundation/DateInterval.swift
index b9ac332ced..8e4990c8f9 100644
--- a/Sources/Foundation/DateInterval.swift
+++ b/Sources/Foundation/DateInterval.swift
@@ -13,7 +13,7 @@
 @_implementationOnly import CoreFoundation
 
 /// DateInterval represents a closed date interval in the form of [startDate, endDate].  It is possible for the start and end dates to be the same with a duration of 0.  DateInterval does not support reverse intervals i.e. intervals where the duration is less than 0 and the end date occurs earlier in time than the start date.
-public struct DateInterval : ReferenceConvertible, Comparable, Hashable {
+public struct DateInterval : ReferenceConvertible, Comparable, Sendable, Hashable {
     public typealias ReferenceType = NSDateInterval
     
     /// The start date.