I just want to display the hour, because It looks more clean, this option was removed and I can't find a way to just hide the day/date from the options, even elemetary-tweaks cant do that, do you guys know where is the file that contains the code of this ?, maybe I can change it by myself
You can download the indicator source with
apt source wingpanel-indicator-datetime
I would start at the source file
src/Widgets/PanelLabel.vala: it seems that removing (all occurences of) the
date_label variable does the trick.
After you can build and install the package
debuild -us -uc sudo dpkg --install ../wingpanel-indicator-datetime*.deb