With a recent clone, building the site locally is broken:
ERROR: YOUR SITE COULD NOT BE BUILT:
------------------------------------
Invalid date '<%= Time.now.strftime('%Y-%m-%d %H:%M:%S %z') %>':
Document 'vendor/bundle/ruby/2.7.0/gems/jekyll-3.9.0/lib/site_template/_posts/0000-00-00-welcome-to-jekyll.markdown.erb'
does not have a valid date in the YAML front matter.
With a recent clone, building the site locally is broken:
ruby-2.7.3p183
Re https://github.com/jekyll/jekyll/issues/5267