~~~~~~~~~~~~~ - Official move to Python3 only support - Version moved to 1.0 as the package has been around and stable long enough to warrant a 1.0
0.22
~~~~~~~~~~~~~~ - Added Shanghai Stock Exchange (SSE) calendar from PR 58 - Added HKEX calendar from PR 61 - Fixed tests for pandas v0.24 and higher
0.21
~~~~~~~~~~~~~~ - Added Oslo Stock Exchange (OSE) calendar - Added GW Bush Holiday to NYSE calendar from PR 53 and 54
0.20
~~~~~~~~~~~~~~ - Improvements in the internals for how calendars are registered and aliased thanks for PR 45
0.19
~~~~~~~~~~~~~~ - schedule() method no longer raises exception if there are no valid trading days between start_date and end_date, will now return an empty DataFrame
0.18
~~~~~~~~~~~~~~ - Changed NYSE holiday calendar to start 1/1/1900 (was previously 1/1/1970). - Fixed an error that schedule() method would fail if the end date was prior to 1993