Hi, on my fresh install of Ubuntu MATE 20.04 I didn't found a way to customize the clock format in the MATE panel (complete notifications bar).
There is only the time, but I would like to have the date as well (and seconds, and a custom format (iso8601), but one after the other... )
Is there a way to customize the mate panel clock format in Ubuntu 20.04?
I switched back and forth from these two options that were proposed by olek and your link:
using the classic clock applet
modifying the new clock format
I managed to apply a custom format to both of them!
But, there is a slight advantage of the classic clock, which is why I switched back to using it:
within custom formats it is possible to use html declarations to make some parts smaller! This was the ultimate solution for me in the past, so I will use it again.
Sadly the configure locations changed, so it took some times to find them out:
Apply custom formats to clock applets
Everything below has to be done in dconf-editor.
New clock (in complete notification applet)
Open dconf-editor
Go to: /com/canonical/indicator/datetime/
Enter your custom format in custom-time-format
Change time-format to the value custom
Voilà, your custom format should have been applied!
Classic clock applet
Add "Clock" to mate panel
Open dconf-editor
Go to: /org/mate/panel/objects/
Go through all object-X entries, until you find one that has the applet-iid=ClockAppletFactory::ClockApplet
Go down to the prefs folder
Enter your custom format in custom-format
Change format to the string custom
Voilà, your custom format should have been applied!
And the same for... /org/mate/panel/objects/object-3/prefs/format
I then somehow deleted the "custom-format" key. You can add it back from Terminal like this: # dconf write /org/mate/panel/objects/object-3/prefs/custom-format "''"
Then go back in to dconf editor as @7even explained and make: format = custom
and in my case I made... custom-format = <span size="small"> %H:%M %n %m/%d/%Y</span>