Help requested on midnight-mode

[aalinovi]

I have the following in my ~/.emacs.d/init.el:

(require 'midnight)
(setq midnight-period 86400) ;; (eq (* 24 60 60) "24 hours")
(midnight-delay-set 'midnight-delay 900)
(add-hook 'midnight-hook 'diary-mail-entries)

which emails me diary entries at 15 minutes past midnight.

What I would like to do is have those diary entries mailed 2 hours
earlier, at 10:00 PM.

I changed the midnight-delay line to read 79200 instead of 900
figuring that 10:00 PM is 79200 seconds past midnight.

Obviously, that doesn't work or I wouldn't be here asking for help.

If anyone can tell me what I am doing wrong and how to correct it, I
wold be grateful.

Thanks

Arthur