<strong>[Link to Voting]</strong> - Scroll down on the page to see the trophies and vote.
I really like the first one (from the reddit gallery), mainly because of the map of Europe and the stars. While the other ones are also nice they lack something characteristic for Europe.
When I want to know what time it is I use World Time Buddy: https://www.worldtimebuddy.com/
You can select a Home Timezone and multiple other timezones. It's nice to see the different times, but also dates and day/night. You can also select timeblocks. I use this to check what times are good to call to the USA as an European by selecting 9:00-17:00 CEST time.