https://www.machform.com/forums/ MachForm Community Forums Topic: Display field logic: dependent on date field input en Mon, 04 May 2026 01:42:20 +0000 https://www.machform.com/forums/topic/display-field-logic-dependent-on-date-field-input#post-19925 Fri, 10 Jan 2014 16:21:44 +0000 redityo 19925@https://www.machform.com/forums/ <p>Hi,</p> <p>You can use date field to show/hide a field but it can not determine the student age.<br /> So, you can set to show the field if the birthday date <strong> is after 1/1/1995</strong> </p> https://www.machform.com/forums/topic/display-field-logic-dependent-on-date-field-input#post-19908 Mon, 06 Jan 2014 17:49:37 +0000 Mogoch 19908@https://www.machform.com/forums/ <p>I have a booking form for a course. If the student is under 18 at the start of the course, I need additional input from a parent.<br /> I would like to display the additional fields only if the course starts less than 18 years after the student's date of birth (ie. the student is under 18).<br /> Is there any way I can use the start date in the logic section? If not, what's the best way to do this? </p>