I'm looking at my Precise 5.7.1 retro.
The Osmo calendar condition is not the same setting as the clock in the
tray which belongs to Joe's Window Manager.
You need to change the clock format line in the file:
Down at the bottom there is a clock format section which default
condition on mine is
%H%M
plus other syntax elements and minixcal
Reading in the
joewing.net site about JWM settings, he refers to a
manual for strftime.
http://man7.org/linux/man-pages/man3/strftime.3.html
That entry shows that %H is 24-hour time while %I is 12 hour time.
So (I would think) you would change your clock format in that file to %I:%M.
BUT
There is a discussion here
http://murga-linux.com/puppy/viewtopic.php?t=73168
... in which the respondent suggested that the elements %H:%M be removed
in favor of just leaving the minixcal element.
So, I'm not sure if my %I:%M which actually looks like
<Clock format="%I:%M">minixcal</Clock>
or
<Clock format=>minixcal</Clock>
is correct.
--
Mike Easter