Fixed #2102: On Windows + Py3, using `|today|` and non-ASCII date format will raise UnicodeEncodeError.

CHANGES

@@ -59,6 +59,8 @@ Bugs fixed
   transforming.
 * On Py2 environment, conf.py that is generated by sphinx-quickstart should have u prefixed
   config value for 'version' and 'release'.
+* #2102: On Windows + Py3, using ``|today|`` and non-ASCII date format will raise
+  UnicodeEncodeError.
 
 Release 1.3.1 (released Mar 17, 2015)
 =====================================

sphinx/util/osutil.py

@@ -158,8 +158,15 @@ if PY2:
         # given by LC_TIME; if that is available, use it
         enc = locale.getlocale(locale.LC_TIME)[1] or 'utf-8'
         return time.strftime(text_type(format).encode(enc), *args).decode(enc)
-else:
-    ustrftime = time.strftime
+else:  # Py3
+    def ustrftime(format, *args):
+        # On Windows, time.strftime() and Unicode characters will raise UnicodeEncodeError.
+        # http://bugs.python.org/issue8304
+        try:
+            return time.strftime(format, *args)
+        except UnicodeEncodeError:
+            r = time.strftime(format.encode('unicode-escape').decode(), *args)
+            return r.encode().decode('unicode-escape')
 
 
 def safe_relpath(path, start=None):