Setting the effectivity date for an item is done in a revisioning workspace that is used to revise/release the item. If your site administrator enabled effectivity for the target state in the lifecycle map, you can choose an effective date for an item.
Go to the revisioning workspace that controls the release of the item for which you want to set an effectivity date.
Click the Linked Items tab.
Click Edit.
By default, effectivity is set to **On Release**. If the lifecycle state has effectivity turned on, the effectivity date picker is available.Even if effectivity is not turned on, an effectivity date is automatically selected for the item as the release date of the change order. This means that ALL items in the system have an effectivity date - either chosen or implied by the release date of the change order.