midnight-timer

midnight-timer is a variable defined in `midnight.el'.
Its value is

[nil 21666 5424 172333 86400 run-hooks
     (midnight-hook)
     nil 914000]

Documentation:
Timer running the `midnight-hook' `midnight-delay' seconds after midnight.
Use `cancel-timer' to stop it and `midnight-delay-set' to change
the time when it is run.