# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1438034826 -7200
# Node ID 4797d69d931d14f3f1b191c2d2b9f76f36b4cb83
# Parent  e7251bf5120cfbc7743dfdb8fd3e0e717af45cf5
Expose UTC usage in datetimes through TZID attributes, preventing
misinterpretation and subsequent misrepresentation in the manager interface.

diff -r e7251bf5120c -r 4797d69d931d imiptools/data.py
--- a/imiptools/data.py	Mon Jul 27 23:44:05 2015 +0200
+++ b/imiptools/data.py	Tue Jul 28 00:07:06 2015 +0200
@@ -366,7 +366,10 @@
         return None
     else:
         value, attr = t
-        return get_datetime(value, attr), attr
+        dt = get_datetime(value, attr)
+        if dt.tzname() == "UTC":
+            attr["TZID"] = "UTC"
+        return dt, attr
 
 # Conversion functions.