Custom label Date Range or Custom date

there is any way to add a custom label for each Date Range? (Any workaround?)
OR
Instead of that, any possibility to remove the "@00:00:00" date format of my legend?

There is an open ticket : https://github.com/elastic/kibana/issues/13784 plz subscribe to it for further updates. I was looking in the advanced settings and I found this:
dateFormat:scaled

Values that define the format used in situations where timebased data is rendered in order, and formatted timestamps should adapt to the interval between measurements. Keys are ISO8601 intervals.

[
  ["", "HH:mm:ss.SSS"],
  ["PT1S", "HH:mm:ss"],
  ["PT1M", "HH:mm"],
  ["PT1H", "YYYY-MM-DD HH:mm"],
  ["P1DT", "YYYY-MM-DD"],
  ["P1YT", "YYYY"]
]