title: Is there a way do color specific dates in input, type = "date"
body: <p>I would like to implement reservations. Because of that, some date ranges are already reserved. Is there any way to color specific dates in the pop up that comes out when I click the little calendar icon.
  I would like to achieve something like this
  <a href="https://i.stack.imgur.com/Kfqn9.jpg" rel="nofollow noreferrer">picture of calendar</a>
  where the red dates are already reserved
  I'm open for any kind of implementation</p>