I need to capture a subscriber's birth month (cusBirthMonth) when a subcriber clicks on one of 12 month-specific links in my email. Landing pages for each month have already been created in ACS, but I don't know how to add the birth month from the link into their profile AND send them to the appropriate landing page. I know HTML, but no coding beyond that. FYI, I added my HTML via the legacy editor not the email designer. Below is a link I added to send them to the landing page for January. What else do I need to add to make it all work?