You can set the calendar properties during creation. Pass in the set_calprops parameter with a value of 1. You can then pass in any additional parameters as defined for the set_calprops command for setting calendar properties.
For more information on calendar properties you can set, see the set_calprops.wcap command.
Note that at calendar creation, if you do not specify calendar properties, the defaults set in the ics.conf file are used.