Cookies :expires value WRONG when I18n locale isn't EN

Working workaround:

  response.headers['Set-Cookie'] = "welcomed=true; path=/; expires=#{I18n.l(1.year.from_now, :locale => :en, :format => "%a, %d-%b-%Y %H:%M:%S GMT")}"

This is not reproducible for me, both in master and 2.3.5.

Created a blank app, added the locales for lv, set default locale to :lv (config.i18n.default_locale = :lv), created a controller that does

def index
  cookies[:test] = {:value => 1, :expires => 1.day.from_now}
end

The result from curl -i http://localhost:3001/test is

Set-Cookie: test=1; path=/; expires=Sun, 16-May-2010 10:05:04 GMT

This is not reproducible. I have tested in master branch.

Could not reproduce either.