Accepted answer

If you want the Datetime format, you need to assign dates too. There is nothing such as a time format.

For that you can assign a date for your times and edit the options to show only the hours and minutes.

You can do something like this:

by adding:

type: 'datetime'
min: Date.UTC(Year, month, day),
max: Date.UTC(Year, month, day)

to your yAxis and also changing your data to date formats like above.

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