Board Thread:General Discussion/@comment-25227018-20161025021440/@comment-4984687-20161025181247

It's most likely possible. You go back in time in for the quests The Nameless Soldier and Window on the Past. For the Nameless Soldier, you have to make a choice, and the future is slightly affected by what you choose. In Window on the Past, you have to get essence from Chimer ghosts and get sent back to a war as a soldier. The Dunme mage in the present, Sorcerer Vunal, tells you to act the part too, or else he doesn't know what will happen.

Alduin was sent forward in time from the Merethic Era to the Fourth Era because Felldir the Old used an Elder Scroll on him, so we know Elder Scrolls can send people forward in time. It hasn't been confirmed if they can send you backward in time, but considering the scrolls exist out of time itself and tell events of both the past and future, it is likely that they can send one back in time.