CST can refer to a timezone in North America: Midnight Japan is 10am in Chicago (US CST) during Chicago's summer, and 9am during Chicago's winter. CST can also refer to a timezone in Australia: Midnight Japan is 00:30 in Adelaide (ACST) during Adelaide's winter and 1.30am during Adelaide's summer. In Darwin, Midnight Japan is always 00:30. See also Japanese Midnight on FFXIclopedia.