Show custom content when loop or wp query reaches specific time?

Like Facebook, the birthday of a user will showing something like “month year day, you were born” on his timeline, or on someday it will show “graduated form ?? School”.

Is it possible for Wordpress query or loop likely to show some custom content when date reaches special day?

I know I can add a custom post type and set schedules, but if it comes to “birthday” or “anniversary”, cycles every year or month, custom post type way will be not so easy.

is there any other way to achieve this like showing something one time at xxxx, showing every year on xxx? Or automatic schedule a post and publish it on the customized cycled date or time?

By the way I think the solution to this will help with the advertisements showing on loop too. :)