+ Pay attention that ``UTCTime`` can not hold full year, so all years
+ having < 50 years are treated as 20xx, 19xx otherwise, according to
+ X.509 recommendation. Use ``GeneralizedTime`` instead for
+ removing ambiguity.
+
+ .. warning::
+
+ No strict validation of UTC offsets are made (only applicable to
+ **BER**), but very crude: