<form class="aui" id="datesForm">
    <div class="field-group">
        <label for="dd-startDate">Start Date
            <span class="aui-icon icon-required">(required)</span></label>
        <input class="text medium-field" type="text"
               id="dd-startDate" name="dd-startDate">
        <div class="description">Please select your Start Date</div>
    </div>
    <div class="field-group">
        <label for="dd-endDate">End Date
            <span class="aui-icon icon-required">(required)</span></label>
        <input class="text medium-field" type="text"
               id="dd-endDate" name="dd-endDate">
        <div class="description">Please select your End Date</div>
    </div>
    
    <div class="buttons-container">
        <div class="buttons">
            <input class="button submit" type="button" value="Create" id="dd-save-button">
        </div>
    </div>
</form>
 
 
<script>
 AJS.$(document).ready(function() {
    AJS.$('#dd-startDate').datePicker({'overrideBrowserDefault': true});
    AJS.$('#dd-endDate').datePicker({'overrideBrowserDefault': true});
 
    AJS.$('#dd-save-button').click(function(){
      AJS.$('.reportedDate').remove();
      var datesBetween = getDates(convertToDate(AJS.$('#dd-startDate').val()), convertToDate(AJS.$('#dd-endDate').val()));
	  for (i=0;i<datesBetween.length;i++){
       var cd = datesBetween[i];
       AJS.$.ajax({
        url: 'https://wiki.vertuna.com/ajax/confiforms/rest/save.action?pageId=11862909&f=myform&mydate=' + cd.getTime(),
        type: "GET",
        success: function (data) {
         showMessage(cd);
        }  
		});
      }
    });
});
 
Date.prototype.addDays = function(days) {
    var dat = new Date(this.valueOf())
    dat.setDate(dat.getDate() + days);
    return dat;
}

function getDates(startDate, stopDate) {
    var dateArray = new Array();
    var currentDate = startDate;
    currentDate = new Date(currentDate)
    while (currentDate <= stopDate) {
        dateArray.push( new Date (currentDate) )
        currentDate = currentDate.addDays(1);
    }
    return dateArray;
}
 
function convertToDate(dateAsString) {
  return new Date(dateAsString); // yy-mm-dd (which is ISO 8601)
}
 
function showMessage(dateToReport) {
  AJS.$('#datesForm').append('<div class="reportedDate aui-message aui-message-info closeable shadowed success"><p>Created record for: ' + dateToReport + '</p></div>');
}
</script>

 

Created dates

 

Storage format for the solution (make sure you change the "pageId" parameter from 11862909 to your pageId (of the page with the form))

<ac:structured-macro ac:macro-id="f39dd63d-b332-4197-9f01-ad83d8dfbb46" ac:name="html" ac:schema-version="1">
  <ac:plain-text-body><![CDATA[<form class="aui" id="datesForm">
    <div class="field-group">
        <label for="dd-startDate">Start Date
            <span class="aui-icon icon-required">(required)</span></label>
        <input class="text medium-field" type="text"
               id="dd-startDate" name="dd-startDate">
        <div class="description">Please select your Start Date</div>
    </div>
    <div class="field-group">
        <label for="dd-endDate">End Date
            <span class="aui-icon icon-required">(required)</span></label>
        <input class="text medium-field" type="text"
               id="dd-endDate" name="dd-endDate">
        <div class="description">Please select your End Date</div>
    </div>
    
    <div class="buttons-container">
        <div class="buttons">
            <input class="button submit" type="button" value="Create" id="dd-save-button">
        </div>
    </div>
</form>
 
 
<script>
 AJS.$(document).ready(function() {
    AJS.$('#dd-startDate').datePicker({'overrideBrowserDefault': true});
    AJS.$('#dd-endDate').datePicker({'overrideBrowserDefault': true});
 
    AJS.$('#dd-save-button').click(function(){
      AJS.$('.reportedDate').remove();
      var datesBetween = getDates(convertToDate(AJS.$('#dd-startDate').val()), convertToDate(AJS.$('#dd-endDate').val()));
	  for (i=0;i<datesBetween.length;i++){
       var cd = datesBetween[i];
       AJS.$.ajax({
        url: 'https://wiki.vertuna.com/ajax/confiforms/rest/save.action?pageId=11862909&f=myform1&mydate=' + cd.getTime(),
        type: "GET",
        success: function (data) {
         showMessage(cd);
        }  
		});
      }
    });
});
 
Date.prototype.addDays = function(days) {
    var dat = new Date(this.valueOf())
    dat.setDate(dat.getDate() + days);
    return dat;
}
function getDates(startDate, stopDate) {
    var dateArray = new Array();
    var currentDate = startDate;
    currentDate = new Date(currentDate)
    while (currentDate <= stopDate) {
        dateArray.push( new Date (currentDate) )
        currentDate = currentDate.addDays(1);
    }
    return dateArray;
}
 
function convertToDate(dateAsString) {
  return new Date(dateAsString); // yy-mm-dd (which is ISO 8601)
}
 
function showMessage(dateToReport) {
  AJS.$('#datesForm').append('<div class="reportedDate aui-message aui-message-info closeable shadowed success"><p>Created record for: ' + dateToReport + '</p></div>');
}
</script>]]></ac:plain-text-body>
</ac:structured-macro>
<ac:structured-macro ac:macro-id="f9697c13-23cf-41ee-9109-d5e69bc6cbc1" ac:name="confiform" ac:schema-version="1">
  <ac:parameter ac:name="formName">myform1</ac:parameter>
  <ac:rich-text-body>
    <p>
      <ac:structured-macro ac:macro-id="964d8753-caa0-427c-b192-76bdf14ce554" ac:name="confiform-field-definition" ac:schema-version="1">
        <ac:parameter ac:name="fieldName">mydate</ac:parameter>
        <ac:parameter ac:name="fieldLabel">mydate</ac:parameter>
        <ac:parameter ac:name="type">date</ac:parameter>
      </ac:structured-macro>
    </p>
  </ac:rich-text-body>
</ac:structured-macro>
<p> </p>
<p>Created dates</p>
<ac:structured-macro ac:macro-id="73a4277d-9627-414e-be24-c2e46f3162a0" ac:name="confiform-table" ac:schema-version="1">
  <ac:parameter ac:name="formName">myform</ac:parameter>
  <ac:rich-text-body>
    <p>
      <ac:structured-macro ac:macro-id="285352b0-ad24-45d9-9a7d-4e62cbe51e2c" ac:name="confiform-field" ac:schema-version="1">
        <ac:parameter ac:name="fieldName">mydate</ac:parameter>
      </ac:structured-macro>
    </p>
  </ac:rich-text-body>
</ac:structured-macro>