End of daylight saving time

[Eckhard M]

Hi all, 

today was the end of daylight saving time in Germany. A line chart shows the hours between 2 and 3 am twice (due to the back switch). That is great!

How can I address the data for the double hour? How do I mark the time for the first and the second time? 

Example: https://jsfiddle.net/cmyok0ws/7/

Thanks, Eckhard