specify timezone in tests

lib/template.html

@@ -97,7 +97,6 @@
   <meta name="google-site-verification" content="{{ site.google_site_verification }}" />
 {% endif %}
 
-
 <script type="application/ld+json">
   {{ seo_tag.json_ld | jsonify }}
 </script>

spec/jekyll_seo_tag/drop_spec.rb

@@ -243,6 +243,8 @@ RSpec.describe Jekyll::SeoTag::Drop do
   end
 
   context "date modified" do
+    let(:config) { { "timezone" => "America/New_York" } }
+
     context "with seo.date_modified" do
       let(:page_meta) { { "seo" => { "date_modified" => "2017-01-01" } } }
 

spec/jekyll_seo_tag/json_ld_spec.rb

@@ -15,7 +15,8 @@ RSpec.describe Jekyll::SeoTag::JSONLD do
   end
   let(:config) do
     {
-      "logo" => "logo",
+      "logo"     => "logo",
+      "timezone" => "America/New_York",
     }
   end
   let(:page)      { make_page(metadata) }