date stamp

例句：

1. 1. The book's date stamp is on the back cover.
   这本书的日期戳记在封面背面。
2. 2.The stamp was issued in honor of the centennial anniversary of the event.
   该邮票是为了纪念该事件一百周年而发行的。
3. 3.The stamp collectors were thrilled to find a rare stamp in their collection.
   邮票收藏家们很高兴在他们收藏中发现了一张罕见的邮票。