templates/default_light/footer.html
{% if extra and extra.generated_by_url -%}
Generated by {{extra | get(key="generated_by", default="Itsy-Gitsy")}} on {{ts_to_git_timestamp(ts=site_generated_ts, tz=site_generated_offset)}}
{% else -%}
Generated by {{extra | get(key="generated_by", default="Itsy-Gitsy")}} on {{ts_to_git_timestamp(ts=site_generated_ts, tz=site_generated_offset)}}
{% endif -%}