diff --git a/api/v1/openapi.yaml b/api/v1/openapi.yaml
index 485b195..90acc09 100644
--- a/api/v1/openapi.yaml
+++ b/api/v1/openapi.yaml
@@ -293,6 +293,61 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/Error"
+    put:
+      summary: Update a date of a training
+      operationId: updateTrainingDate
+      tags:
+        - training dates
+      parameters:
+        - name: trainingID
+          in: path
+          required: true
+          schema:
+            type: string
+            format: uuid
+            x-go-type: training.ID
+            x-go-type-import:
+              path: gitlab.mareshq.com/hq/backoffice/backoffice-api/pkg/training
+        - name: dateID
+          in: path
+          required: true
+          schema:
+            type: string
+            format: uuid
+            x-go-type: training.DateID
+            x-go-type-import:
+              path: gitlab.mareshq.com/hq/backoffice/backoffice-api/pkg/training
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/NewTrainingDate"
+      responses:
+        "200":
+          description: Date updated
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/TrainingDate"
+        "404":
+          description: Date not found
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Error"
+        "400":
+          description: Invalid input
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Error"
+        default:
+          description: Unexpected error
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Error"
 
   /trainings/{trainingID}/dates/{dateID}/attendees:
     get: