The Event Calendar widget does this, but people keep asking for this to be built into the default Digital Clock widget. I think it's probably inevitable.

(In reply to Nate Graham from comment #1)
> The Event Calendar widget does this, but people keep asking for this to be
> built into the default Digital Clock widget. I think it's probably
> inevitable.

it is funny you say, because I related that issue to Event Calendar on a video[1], and i hope it is inevitable because Event Calendar is a great addition! i dont know its codebase if it is active developed etc, but i guess it will gain more attention if it becomes by default

although there should be some re-write on options perhaps
 

[1]https://youtu.be/0npewm2YvNo

(In reply to alex285 from comment #0)
> Created attachment 123457 [details]
> a screen with the issue
> 
> Digital clock Applet it is super huge even when we set the date (which btw i
> believe it should be a default option), and while there is an option to
> change the font, there is not an option to change the size

I liked the super-huge time display because it was easy to read.  After updating Plasma today on my openSUSE Tumbleweed installation, I find that the time is now displayed in a small font (the same size as the date) and so no longer so easy to see at a distance.

It would be great if this change to the default styling could be reverted, or else for this feature request about setting the font size be implemented.

I'd also like to see this added. Especially with the one-liner option now, the clock takes up excessive space. I want to keep the one-liner but have it smaller.

The only thing off about an otherwise truly gorgeous taskbar is the damnable clock!

At a height of 34px, even a "General" font size of 7px looks too large, not to mention everything else becomes entirely unreadable at that size. A separate option for this is a small thing, but it would go a huuuuge way towards polish. It's like the last missing piece.

If you find that the clock text/digits are too big, you might try putting Margins Separator widgets around it in the panel.

Thanks for your reply Nate. Unfortunately I tried it and it didn't seem to have any effect on the size of the clock widget or its font. For now what I've done is simply reverted to using the two-line time/date style, which seems the only way to get the font to a reasonable size. 

I think since the option to hide the date is available, changing font size to match should hopefully follow one day.

workaround
file: DigitalClock.qml

        State {
            name: "oneLineDate"
            // the one-line mode has no effect on a vertical panel because it would never fit
            when: plasmoid.formFactor !== PlasmaCore.Types.Vertical && main.oneLineMode

            PropertyChanges {
                target: main
                Layout.fillHeight: true
                Layout.fillWidth: false
                Layout.minimumWidth: contentItem.width
                Layout.maximumWidth: Layout.minimumWidth

            }

            PropertyChanges {
                target: contentItem

                height: sizehelper.height
                width: dateLabel.width + dateLabel.anchors.rightMargin + labelsGrid.width
            }

            AnchorChanges {
                target: labelsGrid

                anchors.right: contentItem.right
            }

            PropertyChanges {
                target: dateLabel

                height: timeLabel.height
                width: dateLabel.paintedWidth + PlasmaCore.Units.smallSpacing

                font.pixelSize: 20 //workaround
                verticalAlignment: Text.AlignVCenter
                anchors.rightMargin: labelsGrid.columnSpacing

                fontSizeMode: Text.VerticalFit
            }

            AnchorChanges {
                target: dateLabel

                anchors.right: labelsGrid.left
                anchors.verticalCenter: labelsGrid.verticalCenter
            }

            PropertyChanges {
                target: timeLabel

                height: sizehelper.height
                width: sizehelper.contentWidth

                font.pixelSize: 20 //workaround
                fontSizeMode: Text.VerticalFit
            }

With some fonts like "Snap ITC" and show seconds enabled, the width of this widget changes with time seconds changing, causing the whole task bar moves horizontally every second.

Created attachment 149471 [details]
vertical panel, large font

Created attachment 149472 [details]
vertical panel, small font

(In reply to xgdgsc from comment #9)
> With some fonts like "Snap ITC" and show seconds enabled, the width of this
> widget changes with time seconds changing, causing the whole task bar moves
> horizontally every second.

One similar issue is, in a vertical panel, the font size varies widely between one-digit and two-digit hours. (see attachments above)

Created attachment 149501 [details]
Patch on 5.25beta to add font size settings

This is a patch on 5.25 beta. It adds an option (in digital clock's configuration - appearence) to set font size. I'll try to submit it later.

To apply it:
> sudo bash
> cd /usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents
> patch -p1 < digitalclock-fontsize.patch
> # restart plasmashell (systemctl --user restart plasma-plasmashell.service)

I don't know if this applies on 5.24, but you can have a try.

However, it doesn't fix the other problem mentioned above:
> With some fonts like "Snap ITC" and show seconds enabled, the width of this
> widget changes with time seconds changing, causing the whole task bar moves
> horizontally every second.
I guess this requires much greater change, where the widget should remember its max width (when displaying 23:59:59 perhaps) and don't resize every second.

Created attachment 149502 [details]
Screenshot of the patch

A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/1809

Git commit e94e21f2590a937398fe8fe60ae0aae0279e002f by Nate Graham, on behalf of Jin Liu.
Committed on 27/07/2022 at 18:23.
Pushed by ngraham into branch 'master'.

applets/digital-clock: add a font size setting

This allows the user to choose between automatically determined font size
(the default, and the current behavior), and completely manual font settings.

The UI refactor and layout code changes necessary for this feature also
happily fix a few bugs along the way.
Related: bug 421548, bug 395468
FIXED-IN: 5.26

M  +16   -0    applets/digital-clock/package/contents/config/main.xml
M  +56   -55   applets/digital-clock/package/contents/ui/DigitalClock.qml
M  +62   -65   applets/digital-clock/package/contents/ui/configAppearance.qml

https://invent.kde.org/plasma/plasma-workspace/commit/e94e21f2590a937398fe8fe60ae0aae0279e002f

Created attachment 155744 [details]
Screenshot affter the patch

Unfortunately, after the update digital clock in a vertical panel have too small font. Increasing the font size in the Digital Clock settings does nothing, however even smaller fonts work. I assume the panel does not allow Digital Clock element to have more horizontal size than other elements.

The font was bigger before the update. Check the screenshot.

Operating System: Fedora Linux 37
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Kernel Version: 6.0.18-300.fc37.x86_64 (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i7-2640M CPU @ 2.80GHz
Memory: 7,6 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 3000
Manufacturer: LENOVO
Product Name: 4286CTO
System Version: ThinkPad X220

Created attachment 155745 [details]
Video of a bug

Video recording where I change the font and size.

Please file a new bug report when you have a problem with a new feature, rather than re-opening the request for the feature.