diff --git a/api-ref/source/v2-admin/parameters.yaml b/api-ref/source/v2-admin/parameters.yaml
index 3a502f1aca..cbef718be7 100644
--- a/api-ref/source/v2-admin/parameters.yaml
+++ b/api-ref/source/v2-admin/parameters.yaml
@@ -291,12 +291,9 @@ token_expires:
 
     ::
 
-       CCYY-MM-DDThh:mm:ss±hhmm
+       CCYY-MM-DDThh:mm:ss.sssZ
 
-    For example, ``2015-08-27T09:49:58-0500``.
-
-    The ``±hhmm`` value, if included, is the time zone as an offset
-    from UTC. In the previous example, the offset value is ``-0500``.
+    For example, ``2015-08-27T09:49:58.000000Z``.
 
     A ``null`` value indicates that the token never expires.
   in: body
@@ -317,12 +314,9 @@ token_issued_at:
 
     ::
 
-       CCYY-MM-DDThh:mm:ss±hhmm
+       CCYY-MM-DDThh:mm:ss.sssZ
 
-    For example, ``2015-08-27T09:49:58-0500``.
-
-    The ``±hhmm`` value, if included, is the time zone as an offset
-    from UTC. In the previous example, the offset value is ``-0500``.
+    For example, ``2015-08-27T09:49:58.000000Z``.
   in: body
   required: true
   type: string
diff --git a/api-ref/source/v2/parameters.yaml b/api-ref/source/v2/parameters.yaml
index f9688f06a1..56ba2cbf6d 100644
--- a/api-ref/source/v2/parameters.yaml
+++ b/api-ref/source/v2/parameters.yaml
@@ -70,12 +70,9 @@ expires:
 
     ::
 
-       CCYY-MM-DDThh:mm:ss±hhmm
+       CCYY-MM-DDThh:mm:ss.sssZ
 
-    For example, ``2015-08-27T09:49:58-0500``.
-
-    The ``±hhmm`` value, if included, is the time zone as an offset
-    from UTC. In the previous example, the offset value is ``-0500``.
+    For example, ``2015-08-27T09:49:58.000000Z``.
 
     A ``null`` value indicates that the token never expires.
   in: body
@@ -103,12 +100,9 @@ issued_at:
 
     ::
 
-       CCYY-MM-DDThh:mm:ss±hhmm
+       CCYY-MM-DDThh:mm:ss.sssZ
 
-    For example, ``2015-08-27T09:49:58-0500``.
-
-    The ``±hhmm`` value, if included, is the time zone as an offset
-    from UTC. In the previous example, the offset value is ``-0500``.
+    For example, ``2015-08-27T09:49:58.000000Z``.
   in: body
   required: true
   type: string
diff --git a/api-ref/source/v3/parameters.yaml b/api-ref/source/v3/parameters.yaml
index 5942ef0f04..4b055a2e20 100644
--- a/api-ref/source/v3/parameters.yaml
+++ b/api-ref/source/v3/parameters.yaml
@@ -921,12 +921,9 @@ expires_at:
 
     ::
 
-       CCYY-MM-DDThh:mm:ss±hhmm
+       CCYY-MM-DDThh:mm:ss.sssZ
 
-    For example, ``2015-08-27T09:49:58-0500``.
-
-    The ``±hhmm`` value, if included, is the time zone as an offset
-    from UTC. In the previous example, the offset value is ``-0500``.
+    For example, ``2015-08-27T09:49:58.000000Z``.
 
     A ``null`` value indicates that the token never expires.
   in: body
@@ -1094,12 +1091,9 @@ issued_at:
 
     ::
 
-       CCYY-MM-DDThh:mm:ss±hhmm
+       CCYY-MM-DDThh:mm:ss.sssZ
 
-    For example, ``2015-08-27T09:49:58-0500``.
-
-    The ``±hhmm`` value, if included, is the time zone as an offset
-    from UTC. In the previous example, the offset value is ``-0500``.
+    For example, ``2015-08-27T09:49:58.000000Z``.
   in: body
   required: true
   type: string