Changes as a result of the latest discussions:

• Repeating alarms will show there full daynames in the new alarm dialog when an alarm is set to repeat for one or two days. For more than 2 days, it will use abbreviations. Looks like the stock clock switches to abbreviations after 3 days, but that will give space issues in portrait mode (which the stock clock does not have to worry about )
• The main page should use the systemfont ones again. Please check if the three icons in the main screen do align well over the default background, if used (the blue glow effect surrounding the icons, it looks okay in my case with my fonts)
• The date/time dialog now pops up after a long press on the local time in the worldclock screen. Note that the stock clock needs a short press, a small difference
• Introduced GMT/UTC as a separate timezone, which can be chosen from the list of cities. It comes with a small warning: I created a new city id for this, which is unknown to older versions of the replacement clock. So if you set this "new" timezone in your worldclock list and later revert to on older version of the replacement clock, then this version will crash on startup, because it does not know the id. Chances are very small this situation will arise, and can be solved by manually removing the number 999 from the city list in /home/user/.config/worldclock/worldclock.conf

Please report if bugs are encountered.
Download in first post is updated with a new version.