As the code for the Kicker clock has been dumped I think its best to talk about the clock first. So this would be my description of the way a plasma clock should work:
The clock is recommended to always be international by default: 2005-07-20-13:15
The clock can be (partially) selected like plain text and during dragging the user can choose notations with up and down arrows in the tool-tip window. Even though the clock may have been changed by the user from text to graphical the user should be able to grab plain text from it, for example by selecting through the clock face and the date underneath. The clock could simply be a two line text based date-time clock with time at the bottom in a larger font-size.
Here is an example of a tool-tip where the user has just selected and dragged the date from the plasma clock.
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2005-07-20 (International or application) default
20-07-2005
7 Juli, 2005 (Local options)
07-02-2005 (US American)
??-???? (Religious calender)
automatically current (only supported applications)
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The contextual menu would remain mostly the same but a calender view as seen in the current kicker clock should be viewable from a Calender item in the contextual menu as extra's should all be accessible in the same way to avoid doubt and confusion.
The copy to clipboard options from the current contextual menu take way to long as one must remember the target (Dutch or American documentation) and remember the rules of that notation before picking one from the uncategorized list. The tool-tip simply allows for more layout. And follows the users work-flow:
Select what you want to copy from the date-time clock, focus on the target and adjust notation only when realizing that adjustment is necessary, then simply pick from the category list.
The default is recommended by all our governments to prevent disasters and a (Koffice) master document (sorry forgot the name) setting could adjust notation in flight. This would require data-pasting awareness by Koffice and similar applications.
So one selectable clock and all extra's and related accessed in one way (via the contextual menu).