Adjust date / time format of x-axis of time series visualization

Hi @reinhardgut,

sorry for the late reply!

Here is a small piece of my docker-compose.yml to start Grafana (together with InfluxDB and Telegraf).

grafana:
        image: grafana/grafana
        container_name: grafana
        restart: always
        environment:
            - GF_DATE_FORMATS_USE_BROWSER_LOCALE=true
            ...

That was all that was needed for me to have properly formatted date and time captions.