timeclock-first-in-hook

timeclock-first-in-hook is a variable defined in `timeclock.el'.
Its value is

nil

• This variable may be risky if used as a file-local variable.

Documentation:
A hook run for the first "in" event each day.
Note that this hook is run before recording any events. Thus the
value of `timeclock-hours-today', `timeclock-last-event' and the
return value of function `timeclock-last-period' are relative previous
to today.

You can customize this variable.