Whose midnight?
1 January arrives first in UTC+14, then rolls west. The New Year preset lists who among our cities hits local midnight first. A target typed as UTC is one instant for the whole planet.
Eclipses
NASA lists greatest eclipse as a UTC instant. Put that stamp in the countdown if you want a clock to the catalog time, not a local contact.
Widgets
The embed countdown is a bare page you can iframe. It is noindex so it does not compete with this document.