Wrong time in alert

Grafana Alerting
1

Hi,
using a template for a Title of an alert,
I found that the time is not in daylight time!

{{ define "MyTitle" -}}
{{ len .Alerts }} alert(s)
{{ range .Alerts -}}
  Summary: {{.Annotations.summary}}
  Status: {{ .Status }}
  Orario : {{ $startsAt := .StartsAt }} {{ printf "%02d:%02d:%02d" $startsAt.Hour $startsAt.Minute $startsAt.Second }}
{{ end -}}
{{ end }}

How can I fix this ?

and this not works

{{ define "custom_template" }}
  {{ range .Alerts }}
    {{ .StartsAt | tz "Europe/Paris" }}
  {{ end}}
{{ end }}

see https://grafana.com/docs/grafana/next/alerting/configure-notifications/template-notifications/reference/

ERR:function “tz” not defined

this using Grafana v10.2.2

Thank you !