QS:Date max

Maximum date (date_max)

Description

This question attribute can be used to set the minimum value for the date question (in Y-m-d format or any other English valid string - see below for more options). It can be used for both popup and dropdown display options for this question type.

Valid values

• Any date value in format YYYY-MM-DD (eg., 2013-08-24);
• Any year value;
• Any English string : "now", "-10 years", "tomorrow";
• Reference to another date/time question : AnotherDateQuestion (using the question code);
• Expressions: With expressions, a minimum date can be dynamically calculated. For example, you can use a date from a previous answer + 3 days as a minimum date for the present question by entering: date("Y-m-d",strtotime(departuredate)+3*60*60*24).