QS:Date min

Minimum date (date_min)

Description

This question attribute can be used to set the minimum value for the calendar question. It applies to both, the popup-variant of the calendar and the dropdown fields. However, for the dropdown fields, only the year is used as a minimum.

Valid values

1. Date value in format YYYY-MM-DD (eg., 2013-08-24)
2. Reference to another date/time question in curly braces (eg., {dateofbirth} )
3. Expressions, work on a following page, not on the same: E.g, You can use a date from a previous answer + 3 days as a minimum for the present question by entering {date("Y-m-d",strtotime(departuredate)+3*60*60*24)}. The question with the code 'departuredate' has to be on a previous page in the survey (either in a different group in group by group mode or use question by question mode).