Relevant telegraf.conf:

[[inputs.http]]
   urls = [
     "https://data.geo.admin.ch/ch.meteoschweiz.messwerte-aktuell/VQHA80.csv"
   ]
   interval = "10m"
   method = "GET"
   timeout = "15s"
   data_format = "csv"
   csv_delimiter = ";"
   csv_skip_rows = 2
   csv_header_row_count = 1 
   csv_tag_columns = ["stn"]
   csv_timestamp_column = "time"
   csv_timestamp_format = "200601021504"

System info:

Telegraf 1.11.2 (git: HEAD a80d173)

Steps to reproduce:

1. Add the input config above to your Telegraf deamon
2. Execute the command telegraf --test --config=/etc/telegraf/<your_conf>.conf

Expected behavior:

The time timestamp is interpreted as yyyyMMddHHmm.
e.g. 200601021504 for Mon Jan 2 15:04:05 -0700 MST 2006 as in the Go documentation (https://golang.org/pkg/time/#Parse)

Actual behavior:

The time is interpreted as a UNIX format and is therefore, invalid as seen in the related log line below.

2020-04-05T06:55:51Z E! [inputs.http]: Error in plugin: [url=https://data.geo.admin.ch/ch.meteoschweiz.messwerte-aktuell/VQHA80.csv]: Invalid unix format