The czar assigments are maintained on a Google calendar. The program tools/czarcal may be used to create an iCalendar file that can be imported to Google.

dolphin:~> czarcal
usage: czarcal <first czar> <start_date> <num assignments>
  czar list: mark gene bill serge heather chris

Example:
czarcal mark 20111104 30 > novczars.ical

To import to Google select the "Import Calendar" item on the pull down menu labeled "Other calendars" on the left.

For some reason, importing the calendar doesn't work with firefox.