localization of email headers, added the datetime format settings in test_project settings.py with some docs

test_project/test_project/settings.py

@@ -106,6 +106,25 @@ USE_L10N = False
 
 USE_TZ = True
 
+# Webmail datetime formats according to
+# https://docs.djangoproject.com/en/1.10/ref/templates/builtins/
+# modoboa-webmail is able to show the datetime of emails
+# in two ways.
+# If none is provided, default is RFC 5322 formatted date.
+# For this, USE_L10N must be set to True!
+
+# emails of the last week
+# en-us style
+WEBMAIL_SHORT_DATETIME_FORMAT = "l, P"
+# european style
+# WEBMAIL_SHORT_DATETIME_FORMAT = "l, H:i"
+
+# emails older than a week
+# en-us style
+WEBMAIL_DATETIME_FORMAT = "N, j Y P"
+# european style
+# WEBMAIL_DATETIME_FORMAT = "d. N Y H:i"
+
 
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/1.6/howto/static-files/