Age Manipulation (self) – The ability to control your own age. Presumably you could make yourself older but obviously making yourself younger is preferable. Age Manipulation is also known as Gerontokinesis, and Senescence.
Literary Critique of Age Manipulation (self)
This is a superpower with a very old lineage! The Fountain of Youth is an example of this power and first appears in the writings of Herodotus in the 5th Century BC.
Melisandre appears young but is actually quite old and how old is an object of debate among Game of Thrones fans.
Jimmy Olsen (DC) takes an elixir to become older in Jimmy Olsen #47. The fountain of youth in reverse!
Simon Drudd (Marvel) goes ahead and drinks the elixir of youth with ironic results in Tales to Astonish V1 #10.