See also bug 299174 ;)

Thanks for the report

At this point, we're not going to add those to the official applet shipped with Plasma. But it's Plasma and adding it to the QML would be easy, even distributing the resulting applet would be easy and replacing the current one with the new one is super easy thanks to the right click -> Alternatives... feature.

I'm happy to assist with such changes, but not for the official applet, sorry.

*** Bug 340013 has been marked as a duplicate of this bug. ***

*** Bug 343713 has been marked as a duplicate of this bug. ***

Given the overly high demand for this feature I'm reconsidering the decision and thinking about putting it as an option to the main applet.

I'll see what the general opinion in Plasma is.

This is something I also miss a lot and a couple of colleagues too. Actually, I'm always complaining about all other calendars that doesn't show the week number.

*** Bug 346305 has been marked as a duplicate of this bug. ***

Sorry for filling a duplicate 338195.
WONTFIX is disappointing.

I always used the week number at work, to write down my hours for a week. Now I am really stranded without.

This simple feature may look trivial for some of let me assure you, it is not. 

Our entire company runs on Linux/KDE. 
 I use KDE for my every day work. We and all our customers plan everything with week numbers. 
I made the mistake and upgrading to 5.9 and guess what, it feels like someone has cut off my arms because of this little missing number in calendar. 

Martin Klapetek, please confirm this is going to be fixed ASAP. 

Thank you

I confirm. For professionals week numbers are veeery important.

*** Bug 347930 has been marked as a duplicate of this bug. ***

@ Martin

I do hope this is reconsidered. Week numbers are very important to some users, myself included. I would very much like to see the option to display them as before.

I was very disappointed when noticing that the week numbers were gone after upgrading to Kubuntu 15.04 and Plasma 5. Of the little things, this is the absolutely most important missing things. Just this week I showed a colleague how to look up the week numbers after he had been looking for them on his Windows computer.

Any news? I am really suffering here. 
I have my terminal window open and I use date command to get week numbers. This is absurd. What's next? Get a paper calendar? :) 

PS! There is another nag - dates can not be copied from calendar. 
This is another serious step back to uselessness. 

Do devs actually use KDE for their daily work or is it just for fun project with no connection to any real life users of KDE? Especially business users.

It's done, waiting for review.

> Do devs actually use KDE for their daily work or is it just for fun project with no connection to any real life users of KDE? 

Yes we do. Not everyone nor everywhere in the world people need and/or use week numbers.

Git commit 5caba3cfaff270a1a1b376451a56c6506cb4e1ce by Martin Klapetek.
Committed on 05/06/2015 at 12:34.
Pushed by mklapetek into branch 'master'.

[calendar] Add week numbers in Calendar components

Change-Id: Ie46b9b9c1e6035a9b2933362227d3c8fcd30a10e
REVIEW: 124004
CHANGELOG: Calendar components can now display week numbers

M  +4    -4    src/declarativeimports/calendar/calendar.cpp
M  +5    -3    src/declarativeimports/calendar/calendar.h
M  +42   -8    src/declarativeimports/calendar/qml/DaysCalendar.qml
M  +2    -1    src/declarativeimports/calendar/qml/MonthView.qml

http://commits.kde.org/plasma-framework/5caba3cfaff270a1a1b376451a56c6506cb4e1ce

Oh, how nice! Thanks for reconsidering and implementing. I have week numbers back now.

So this is closable?

No, there's still that "part 2" in the reviewboard. That will close this.

Git commit a500d06431fbe795374eb746a7e64d9b4addbe2c by Martin Klapetek.
Committed on 10/06/2015 at 11:58.
Pushed by mklapetek into branch 'master'.

[digital-clock] Add week numbers to calendar

REVIEW: 124005
FIXED-IN: 5.4.0

M  +4    -1    applets/digital-clock/package/contents/config/main.xml
M  +2    -1    applets/digital-clock/package/contents/ui/CalendarView.qml
M  +6    -0    applets/digital-clock/package/contents/ui/configAppearance.qml

http://commits.kde.org/plasma-workspace/a500d06431fbe795374eb746a7e64d9b4addbe2c

With framework version 5.11 week numbers came back. But since 5.12 they are gone again.

The feature is disabled by default and is part of Plasma framework release (where the calendar components are placed), however the option to enable them is only in the next Plasma release, which contains the actual applet. This is unfortunately a consequence of how the releases are structured. 

tl;dr - wait for Plasma 5.4.

Good work, Plasma team!

I believe I do have plasma 5.4 (Debian unstable, current), and my calendar doesn't have week numbers. Those are very very very important in middle europe's business life.

You can check your plasma version in kinfocenter

Also you need to enable week numbers in:
 digital clock settings -> show week numbers in calendar

And you also need Plasma framework 5.12 at least.

(In reply to Martin Klapetek from comment #27)
> And you also need Plasma framework 5.12 at least.

5.14 here

Then you have the option just turned off, just switch it on in the applet settings.

I can confirm that for an explicitly configured instance of the calender applet. I wasn't even aware that this was a dedicated applet. I invoke the calendar by clicking on the "Digital Clock" applet in my panel. How do I configure this instance of the calendar applet which is obviously called up as some sub-applet of the Digital Clock.

Right click on the clock applet -> Digital Clock Settings -> Show week numbers in Calendar. This is already in comment #26.

(In reply to Martin Klapetek from comment #31)
> Right click on the clock applet -> Digital Clock Settings -> Show week
> numbers in Calendar. This is already in comment #26.

Thanks for your patience and excuse me being a particularly bad idiot this time. I simply didn't see the option and apologize. Things are fine now.