wx.lib.calendar.CalenDlg,how to set the years range?
The demo is using a SpinButton for the year range which is restricting the lower end to 1980.
See line 120 of the demo Calendar code.
If you are using a similar dialog control, simply open it up for a larger year range.
If you want to get behind the scenes, see the calendar.py module in the Lib. You will see the year object which you can set with SetYear(year)