I have a birthday flow set up, and sent out a manage preferences campaign to collect birthdays through a preferences page. Only problem is, Klaviyo doesn’t have a way to restrict what a subscriber can type into a box via a preferences page.

There is no “date” box option, only text. I did give instructions above the box for how to format the date, but as we all know, some people don’t follow the instructions. Here’s a screenshot of the field:

I did a test run for the manage preferences campaign and about 80% of people filled out the pet birthday correctly, with the right format

I know that you can do a sign-up form, or a custom preference page that’s hosted on your site where you could restrict what gets typed in the box, but that’s not ideal for us since we don't have a coder on staff.

My question is: does anyone have a better way of collecting birthdates that doesn’t involve a custom html page?