visualize date and time from raspberry pi

I would like to have the system time of the host (Raspberry Pi), on which grafana is also installed, visualised in grafana.

Unfortunately I don’t know how to convert the output of “date” = “Fri 1 Apr 07:54:45 BST 2022” into an understandable form and send it to influxdb.
into a comprehensible form and pass it to influxdb.

have you tried the clock panel?