Displaying timezone information in HTML report (#960)

* Displaying timezone information in HTML report

* A helpber to format datetime with local timezone

* No backward compatibility with older python versions

43 files changed, 64 insertions, 40 deletions

diff --git a/CHANGES.rst b/CHANGES.rst
index 43beb35e..1ecbec24 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -28,6 +28,10 @@ Unreleased
 - The dark mode HTML report still used light colors for the context listing,
   making them unreadable (`issue 1009`_).  This is now fixed.
 
+- The time stamp on the HTML report now includes the time zone. Thanks, Xie
+  Yanbo (`pull request 960`_).
+
+.. _pull request 960: https://github.com/nedbat/coveragepy/pull/960
 .. _issue 1009: https://github.com/nedbat/coveragepy/issues/1009
 
 
diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 2219ae35..99b8493f 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -135,6 +135,7 @@ Thijs Triemstra
 Titus Brown
 Vince Salvino
 Ville Skyttä
+Xie Yanbo
 Yury Selivanov
 Zac Hatfield-Dodds
 Zooko Wilcox-O'Hearn
diff --git a/coverage/backward.py b/coverage/backward.py
index 37b49167..9d1d78e5 100644
--- a/coverage/backward.py
+++ b/coverage/backward.py
@@ -9,6 +9,8 @@
 import os
 import sys
 
+from datetime import datetime
+
 from coverage import env
 
 
@@ -217,6 +219,17 @@ except ImportError:
             return self.__dict__ == other.__dict__
 
 
+def format_local_datetime(dt):
+    """Return a string with local timezone representing the date.
+    If python version is lower than 3.6, the time zone is not included.
+    """
+    try:
+        return dt.astimezone().strftime('%Y-%m-%d %H:%M %z')
+    except (TypeError, ValueError):
+        # Datetime.astimezone in Python 3.5 can not handle naive datetime
+        return dt.strftime('%Y-%m-%d %H:%M')
+
+
 def invalidate_import_caches():
     """Invalidate any import caches that may or may not exist."""
     if importlib and hasattr(importlib, "invalidate_caches"):
diff --git a/coverage/html.py b/coverage/html.py
index 596e1143..3596bbe1 100644
--- a/coverage/html.py
+++ b/coverage/html.py
@@ -11,7 +11,7 @@ import shutil
 
 import coverage
 from coverage import env
-from coverage.backward import iitems, SimpleNamespace
+from coverage.backward import iitems, SimpleNamespace, format_local_datetime
 from coverage.data import add_data_to_hash
 from coverage.files import flat_rootname
 from coverage.misc import CoverageException, ensure_dir, file_be_gone, Hasher, isolate_module
@@ -200,7 +200,7 @@ class HtmlReporter(object):
             '__url__': coverage.__url__,
             '__version__': coverage.__version__,
             'title': title,
-            'time_stamp': datetime.datetime.now().strftime('%Y-%m-%d %H:%M'),
+            'time_stamp': format_local_datetime(datetime.datetime.now()),
             'extra_css': self.extra_css,
             'has_arcs': self.has_arcs,
             'show_contexts': self.config.show_contexts,
diff --git a/tests/gold/html/a/a_py.html b/tests/gold/html/a/a_py.html
index d534c6a3..af5d72a1 100644
--- a/tests/gold/html/a/a_py.html
+++ b/tests/gold/html/a/a_py.html
@@ -61,7 +61,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/a/index.html b/tests/gold/html/a/index.html
index e1c585fc..3276f1d6 100644
--- a/tests/gold/html/a/index.html
+++ b/tests/gold/html/a/index.html
@@ -76,7 +76,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/b_branch/b_py.html b/tests/gold/html/b_branch/b_py.html
index 67a1b83b..ee28735e 100644
--- a/tests/gold/html/b_branch/b_py.html
+++ b/tests/gold/html/b_branch/b_py.html
@@ -84,7 +84,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/b_branch/index.html b/tests/gold/html/b_branch/index.html
index 8b68b26e..0dfc20ca 100644
--- a/tests/gold/html/b_branch/index.html
+++ b/tests/gold/html/b_branch/index.html
@@ -84,7 +84,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/bom/2/bom_py.html b/tests/gold/html/bom/2/bom_py.html
index 74f4f2fe..a6698845 100644
--- a/tests/gold/html/bom/2/bom_py.html
+++ b/tests/gold/html/bom/2/bom_py.html
@@ -67,7 +67,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:32
+            created at 2019-10-14 09:32 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/bom/2/index.html b/tests/gold/html/bom/2/index.html
index 3fa67f0f..28abec0a 100644
--- a/tests/gold/html/bom/2/index.html
+++ b/tests/gold/html/bom/2/index.html
@@ -76,7 +76,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-13 11:41
+            created at 2019-10-13 11:41 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/bom/bom_py.html b/tests/gold/html/bom/bom_py.html
index 10b84ede..3b181c63 100644
--- a/tests/gold/html/bom/bom_py.html
+++ b/tests/gold/html/bom/bom_py.html
@@ -67,7 +67,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/bom/index.html b/tests/gold/html/bom/index.html
index b08e9c1c..0e56a99a 100644
--- a/tests/gold/html/bom/index.html
+++ b/tests/gold/html/bom/index.html
@@ -76,7 +76,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/isolatin1/index.html b/tests/gold/html/isolatin1/index.html
index 7e33e754..ec9c50b5 100644
--- a/tests/gold/html/isolatin1/index.html
+++ b/tests/gold/html/isolatin1/index.html
@@ -76,7 +76,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/isolatin1/isolatin1_py.html b/tests/gold/html/isolatin1/isolatin1_py.html
index b344bad6..3dd8c8fd 100644
--- a/tests/gold/html/isolatin1/isolatin1_py.html
+++ b/tests/gold/html/isolatin1/isolatin1_py.html
@@ -61,7 +61,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_1/index.html b/tests/gold/html/omit_1/index.html
index d8d02f6a..a97add0f 100644
--- a/tests/gold/html/omit_1/index.html
+++ b/tests/gold/html/omit_1/index.html
@@ -97,7 +97,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_1/m1_py.html b/tests/gold/html/omit_1/m1_py.html
index 57584495..94fba21e 100644
--- a/tests/gold/html/omit_1/m1_py.html
+++ b/tests/gold/html/omit_1/m1_py.html
@@ -58,7 +58,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_1/m2_py.html b/tests/gold/html/omit_1/m2_py.html
index e8c1791d..ade526d3 100644
--- a/tests/gold/html/omit_1/m2_py.html
+++ b/tests/gold/html/omit_1/m2_py.html
@@ -58,7 +58,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_1/m3_py.html b/tests/gold/html/omit_1/m3_py.html
index e714d47f..d6b4756d 100644
--- a/tests/gold/html/omit_1/m3_py.html
+++ b/tests/gold/html/omit_1/m3_py.html
@@ -58,7 +58,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_1/main_py.html b/tests/gold/html/omit_1/main_py.html
index 28173d12..5d478124 100644
--- a/tests/gold/html/omit_1/main_py.html
+++ b/tests/gold/html/omit_1/main_py.html
@@ -66,7 +66,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_2/index.html b/tests/gold/html/omit_2/index.html
index d51ebd2a..5b5e3c6e 100644
--- a/tests/gold/html/omit_2/index.html
+++ b/tests/gold/html/omit_2/index.html
@@ -90,7 +90,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_2/m2_py.html b/tests/gold/html/omit_2/m2_py.html
index e8c1791d..ade526d3 100644
--- a/tests/gold/html/omit_2/m2_py.html
+++ b/tests/gold/html/omit_2/m2_py.html
@@ -58,7 +58,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_2/m3_py.html b/tests/gold/html/omit_2/m3_py.html
index e714d47f..d6b4756d 100644
--- a/tests/gold/html/omit_2/m3_py.html
+++ b/tests/gold/html/omit_2/m3_py.html
@@ -58,7 +58,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_2/main_py.html b/tests/gold/html/omit_2/main_py.html
index 28173d12..5d478124 100644
--- a/tests/gold/html/omit_2/main_py.html
+++ b/tests/gold/html/omit_2/main_py.html
@@ -66,7 +66,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_3/index.html b/tests/gold/html/omit_3/index.html
index 0d8ff217..f5bc1aae 100644
--- a/tests/gold/html/omit_3/index.html
+++ b/tests/gold/html/omit_3/index.html
@@ -83,7 +83,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_3/m3_py.html b/tests/gold/html/omit_3/m3_py.html
index e714d47f..d6b4756d 100644
--- a/tests/gold/html/omit_3/m3_py.html
+++ b/tests/gold/html/omit_3/m3_py.html
@@ -58,7 +58,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_3/main_py.html b/tests/gold/html/omit_3/main_py.html
index 28173d12..5d478124 100644
--- a/tests/gold/html/omit_3/main_py.html
+++ b/tests/gold/html/omit_3/main_py.html
@@ -66,7 +66,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_4/index.html b/tests/gold/html/omit_4/index.html
index d91291fc..861ba02e 100644
--- a/tests/gold/html/omit_4/index.html
+++ b/tests/gold/html/omit_4/index.html
@@ -90,7 +90,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
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 </div>
diff --git a/tests/gold/html/omit_4/m1_py.html b/tests/gold/html/omit_4/m1_py.html
index 57584495..94fba21e 100644
--- a/tests/gold/html/omit_4/m1_py.html
+++ b/tests/gold/html/omit_4/m1_py.html
@@ -58,7 +58,7 @@
     <div class="content">
         <p>
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-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
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diff --git a/tests/gold/html/omit_4/m3_py.html b/tests/gold/html/omit_4/m3_py.html
index e714d47f..d6b4756d 100644
--- a/tests/gold/html/omit_4/m3_py.html
+++ b/tests/gold/html/omit_4/m3_py.html
@@ -58,7 +58,7 @@
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-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
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diff --git a/tests/gold/html/omit_4/main_py.html b/tests/gold/html/omit_4/main_py.html
index 28173d12..5d478124 100644
--- a/tests/gold/html/omit_4/main_py.html
+++ b/tests/gold/html/omit_4/main_py.html
@@ -66,7 +66,7 @@
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-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
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diff --git a/tests/gold/html/omit_5/index.html b/tests/gold/html/omit_5/index.html
index f1e0fe60..8afbebad 100644
--- a/tests/gold/html/omit_5/index.html
+++ b/tests/gold/html/omit_5/index.html
@@ -83,7 +83,7 @@
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         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/omit_5/m1_py.html b/tests/gold/html/omit_5/m1_py.html
index 57584495..94fba21e 100644
--- a/tests/gold/html/omit_5/m1_py.html
+++ b/tests/gold/html/omit_5/m1_py.html
@@ -58,7 +58,7 @@
     <div class="content">
         <p>
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-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
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diff --git a/tests/gold/html/omit_5/main_py.html b/tests/gold/html/omit_5/main_py.html
index 28173d12..5d478124 100644
--- a/tests/gold/html/omit_5/main_py.html
+++ b/tests/gold/html/omit_5/main_py.html
@@ -66,7 +66,7 @@
     <div class="content">
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-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
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diff --git a/tests/gold/html/other/blah_blah_other_py.html b/tests/gold/html/other/blah_blah_other_py.html
index 8f0309d4..d88e21e5 100644
--- a/tests/gold/html/other/blah_blah_other_py.html
+++ b/tests/gold/html/other/blah_blah_other_py.html
@@ -60,7 +60,7 @@
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-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
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diff --git a/tests/gold/html/other/here_py.html b/tests/gold/html/other/here_py.html
index c2f6b5f1..94491fb0 100644
--- a/tests/gold/html/other/here_py.html
+++ b/tests/gold/html/other/here_py.html
@@ -62,7 +62,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/other/index.html b/tests/gold/html/other/index.html
index fa1a770f..644d1490 100644
--- a/tests/gold/html/other/index.html
+++ b/tests/gold/html/other/index.html
@@ -83,7 +83,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/partial/index.html b/tests/gold/html/partial/index.html
index fa1ec4ad..f766c0b4 100644
--- a/tests/gold/html/partial/index.html
+++ b/tests/gold/html/partial/index.html
@@ -84,7 +84,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 12:01
+            created at 2019-10-14 12:01 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/partial/partial_py.html b/tests/gold/html/partial/partial_py.html
index abd755d0..c301a58a 100644
--- a/tests/gold/html/partial/partial_py.html
+++ b/tests/gold/html/partial/partial_py.html
@@ -74,7 +74,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 12:01
+            created at 2019-10-14 12:01 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/styled/a_py.html b/tests/gold/html/styled/a_py.html
index 7b6f9dcd..b81641cc 100644
--- a/tests/gold/html/styled/a_py.html
+++ b/tests/gold/html/styled/a_py.html
@@ -62,7 +62,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/styled/index.html b/tests/gold/html/styled/index.html
index 6e182fa6..d1a9259b 100644
--- a/tests/gold/html/styled/index.html
+++ b/tests/gold/html/styled/index.html
@@ -77,7 +77,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/unicode/index.html b/tests/gold/html/unicode/index.html
index bfa09a38..b2de7b3d 100644
--- a/tests/gold/html/unicode/index.html
+++ b/tests/gold/html/unicode/index.html
@@ -76,7 +76,7 @@
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/gold/html/unicode/unicode_py.html b/tests/gold/html/unicode/unicode_py.html
index a4218bcc..311427d3 100644
--- a/tests/gold/html/unicode/unicode_py.html
+++ b/tests/gold/html/unicode/unicode_py.html
@@ -61,7 +61,7 @@
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>
diff --git a/tests/test_html.py b/tests/test_html.py
index b543fa08..6f22acc0 100644
--- a/tests/test_html.py
+++ b/tests/test_html.py
@@ -71,6 +71,11 @@ class HtmlTestHelpers(CoverageTest):
         with open("htmlcov/index.html") as f:
             index = f.read()
         index = re.sub(
+            r"created at \d{4}-\d{2}-\d{2} \d{2}:\d{2} \+\d{4}",
+            r"created at YYYY-MM-DD HH:MM +ZZZZ",
+            index,
+        )
+        index = re.sub(
             r"created at \d{4}-\d{2}-\d{2} \d{2}:\d{2}",
             r"created at YYYY-MM-DD HH:MM",
             index,
@@ -620,6 +625,7 @@ def compare_html(expected, actual):
     scrubs = [
         (r'/coverage.readthedocs.io/?[-.\w/]*', '/coverage.readthedocs.io/VER'),
         (r'coverage.py v[\d.abc]+', 'coverage.py vVER'),
+        (r'created at \d\d\d\d-\d\d-\d\d \d\d:\d\d [-+]\d\d\d\d', 'created at DATE'),
         (r'created at \d\d\d\d-\d\d-\d\d \d\d:\d\d', 'created at DATE'),
         # Some words are identifiers in one version, keywords in another.
         (r'<span class="(nam|key)">(print|True|False)</span>', r'<span class="nam">\2</span>'),