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| -rw-r--r-- | src/pytz/__init__.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/pytz/__init__.py b/src/pytz/__init__.py index 6208a1e..ac6b455 100644 --- a/src/pytz/__init__.py +++ b/src/pytz/__init__.py @@ -157,6 +157,9 @@ def timezone(zone): Unknown ''' + if zone is None: + raise UnknownTimeZoneError(None) + if zone.upper() == 'UTC': return utc |