The Calendar question type manipulates the internal calendar during interviews. There are 28 different functions available for this type of question. A calendar can be declared, initialized, marked or unmarked; it can be combined with others, or it can be displayed on the screen. Each function has a specific syntax. Details on the calendar functions are found below.

All Calendar syntax must have the parentheses "()" around the variables and each function must end with a semi-colon (;). The following list helps locate a particular function.

Below is a list of calendar functions with a brief explanation. To view a detailed description with syntax and examples click on one and jump to the Calendar Functions section.

ADD YEARS	Add n years to a date
AGE (SINGLE)	Single age calculations
AGE (ARRAY)	Array age calculations
COMBINE	Combine calendar
CREATE	Create new calendar
DATE2DAY	Date conversion
DATE2WK	Date conversion
DAY2DATE	Date conversion
DIFFAGE	Calculate differences in dates
EXPANDDATE	Date expansion
FINDGAPS	Create gap table
FIXDAY	Repair a day in a date
FIXMONTH	Repair a month in a date
FIXYEAR	Repair a year in a date
GETSUBDATE	Extract part of a date
INIT	Initialize calendar
ISCOMPLETE	Check for a completed date
ISMARKED	Check range for marked dates
MARK	Mark segments
PRINT	Display calendar
STATUS	Check range for marked dates
UNMARK	Unmark Segments
WK2DATE	Date Conversion