39.14 Summing Time Intervals
The timeclock feature adds up time intervals, so you can (for
instance) keep track of how much time you spend working.
Use the M-x timeclock-in command when you start working on a
project, and M-x timeclock-out command when you're done. Each
time you do this, it adds one time interval to the record of the
project. You can change to working on a different project with M-x
Once you've collected data from a number of time intervals, you can use
M-x timeclock-workday-remaining to see how much time is left to
work today (assuming a typical average of 8 hours a day), and M-x
timeclock-when-to-leave which will calculate when you're “done.”
If you want Emacs to display the amount of time “left” of your
workday in the mode line, either customize the
timeclock-modeline-display variable and set its value to
t, or invoke the M-x timeclock-modeline-display command.
Terminating the current Emacs session might or might not mean that you
have stopped working on the project and, by default, Emacs queries this.
You can, however, set the value of the variable
nil (via M-x
customize) to avoid this behavior; then, only an explicit M-x
timeclock-out or M-x timeclock-change will tell Emacs that the
current interval is over.
The timeclock functions work by accumulating the data in a file
called .timelog in your home directory. You can specify a
different name for this file by customizing the variable
timeclock-file. If you edit the timeclock file manually, or if
you change the value of any of timeclock's customizable variables, you
should run the command M-x timeclock-reread-log to update the
data in Emacs from the file.