Invalid Django TIME_ZONE

在linux操作系统运行，设置的时区在系统文件/usr/share/zoneinfo/中找不到会出现以下错误

1. raceback (most recent call last):
     File "manage.py", line 11, in <module>
       execute_manager(settings)
     File "/usr/lib/python2.6/site-packages/Django-1.3-py2.6.egg/django/core/management/__init__.py", line 438, in execute_manager
       utility.execute()
     File "/usr/lib/python2.6/site-packages/Django-1.3-py2.6.egg/django/core/management/__init__.py", line 379, in execute
       self.fetch_command(subcommand).run_from_argv(self.argv)
     File "/usr/lib/python2.6/site-packages/Django-1.3-py2.6.egg/django/core/management/__init__.py", line 252, in fetch_command
       app_name = get_commands()[subcommand]
     File "/usr/lib/python2.6/site-packages/Django-1.3-py2.6.egg/django/core/management/__init__.py", line 101, in get_commands
       apps = settings.INSTALLED_APPS
     File "/usr/lib/python2.6/site-packages/Django-1.3-py2.6.egg/django/utils/functional.py", line 276, in __getattr__
       self._setup()
     File "/usr/lib/python2.6/site-packages/Django-1.3-py2.6.egg/django/conf/__init__.py", line 42, in _setup
       self._wrapped = Settings(settings_module)
     File "/usr/lib/python2.6/site-packages/Django-1.3-py2.6.egg/django/conf/__init__.py", line 125, in __init__
       raise ValueError("Incorrect timezone setting: %s" % self.TIME_ZONE)
   ValueError: Incorrect timezone setting: America/New_York 

   比如Asia/shanghai也会出错，真正文件夹/usr/share/zoneinfo/Asia/Shanghai，因此需要设置为Asia/Shanghai