1.   Our family calendar has also become a forum for math talks.

2.   Her records sold millions, her films were box-office hits here, and her risque calendars became collectors items.

3.   The calendar becomes a major factor.

4.   The calendar will become crowded very quickly, and election-year politics may serve to lighten the load.

5.   The FIA listed three races with problems to be resolved before the calendar becomes official.