From 09556dd88062b966034927e2d6a28ae3cdaae94b Mon Sep 17 00:00:00 2001
From: MinchinWeb <w_minchin@hotmail.com>
Date: Sun, 11 Jul 2021 13:40:08 -0600
Subject: [PATCH] Support date format codes G, V, and u (used by ISO dates)

---
 pelican/utils.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pelican/utils.py b/pelican/utils.py
index 8c3a886d..7b369b08 100644
--- a/pelican/utils.py
+++ b/pelican/utils.py
@@ -50,7 +50,8 @@ def strftime(date, date_format):
     '''
     def strip_zeros(x):
         return x.lstrip('0') or '0'
-    c89_directives = 'aAbBcdfHIjmMpSUwWxXyYzZ%'
+    # includes ISO date parameters added by Python 3.6
+    c89_directives = 'aAbBcdfGHIjmMpSUuVwWxXyYzZ%'
 
     # grab candidate format options
     format_options = '%[-]?.'
@@ -98,7 +99,6 @@ class SafeDatetime(datetime.datetime):
         else:
             return super().strftime(fmt)
 
-
 class DateFormatter:
     '''A date formatter object used as a jinja filter