Return true if the specified date is within the valid range of this calendar (i.e., firstDate() <= date <= lastDate()), and false otherwise. Note that the valid range for a Calendar is empty if its length is 0.
true
date
firstDate() <= date <= lastDate()
false
Calendar
Declared in <bdlt_calendar.h>
<bdlt_calendar.h>
bool isInRange(Date const& date) const;