Date formats are different for system and in System Tray

In trying to get a simplified date format in the System Tray to reduce clutter. I note the the format there is different from the ones in SystemSettings > Region&Language and in the hover-hint for the system tray time/date.

Is is possible to set a simplified system tray date like 10-Jun or even just 10th? The date there presently appears as 2026-06-10. Messy, and I don’t need a reminder of the year and month.

Oddly, my system setting is English with date formats there shown as “10 June 2026 at…” and under that, “10 06 2026 21:47”. So … the OS and DE are capable of multiple formats for English. And I can’t find a way to change that setting (Modify loops me back to that).

Further, the hint for the system tray clock gives: June 10,2026.

So, with all those differing and readily showable formats, it seems there should be a way to get what I want. Hopefully, that is. dd Mmm or ddth possible?

Context (RIGHT MOUSE BUTTON) click the clock, select ‘configure Digital Clock’

Set the date format to d if you want just the time and the date (10).

Mine just shows Wed 10 Jun using ddd d MMM - there’s a link to get more information.

OK. I see that I had tried the custom setting once before, with odd results (d mmm gave a 4-digit number). From you guidance, the m characters have to be upper case. That works! Thanks.

Yeah, in Qt date formats lower-case m means minutes and upper-case M means months.

Confusingly this is the opposite convention to the strftime formats used in C, C++, Python etc etc.

When words are underlined, like Time Format Documentation then you can click those words to go to the link.