You need to create 2 embedded variable.

Enrolment date: “EnrollmentDate”

Text set variable: “surveyAccessible” Answer codes “true” and “false”

Paste this in first question. It can be a text info question.

Qualtrics.SurveyEngine.addOnload(function() {

  /* Place your JavaScript here to run when the page loads */

  var enrollmentDate = "${e://Field/EnrollmentDate}"; // Replace with the actual embedded data for enrollment date
  var currentDate = new Date();

  var enrollmentDateObj = new Date(enrollmentDate);

  // Calculate the start and end dates of the survey window period based on enrollment date
  var surveyStartDate = new Date(enrollmentDateObj);
  surveyStartDate.setMonth(surveyStartDate.getMonth() + 2); // Start survey window 2 months after enrollment
  surveyStartDate.setDate(1); // Set the start date to the 1st day of the month

  var surveyEndDate = new Date(surveyStartDate);
  surveyEndDate.setMonth(surveyEndDate.getMonth() + 1); // End survey window 1 month after the start date
  surveyEndDate.setDate(0); // Set the end date to the last day of the month

  // Check if the current date falls within the survey window period
  if (currentDate >= surveyStartDate && currentDate <= surveyEndDate) {
    Qualtrics.SurveyEngine.setEmbeddedData("surveyAccessible", "true");
  } else {
    Qualtrics.SurveyEngine.setEmbeddedData("surveyAccessible", "false");
  }
});

Now you can screen out condition based on the variable “surveyAccessible”

Thank you! 

Follow-up question is how exactly should I implement this? 

What I am trying to do is that if this embedded variable (in this case, surveyAccessible) you created is false, I want them out of the survey.

Here, I have the branch set up but I am not sure what would be the condition of the branch. 

Thank you again!

@praveengeorgeix 

I hope you didn the below step of adding embedded data. Set the type from options as text set

and set as below.

you need to type in false. its case sensitive

@praveengeorgeix Thank you! 

One last question, what would be the JavaScript code that would determine survey accessible for let’s say 6 months after the enrollment date? 

For example, if the current date is in between 3 months period, then surveyAccessible will equal 3 (instead of false in this case). If the current date is in between 6 months period, then surveyAccessible will equal 6. And so on. 

I am just trying to see if I can modify your code to further assess the other time period when the survey should become available. Or if you have other suggestions, I am all ears! 

Thank you again! 

Thank you for this thread! I’m looking to do something similar on the time-span of weeks instead of months (e.g., open for 2 weeks after completing survey 1, closing 4 weeks after completing survey 1). How might I change the code accordingly?