<input 
  type="date"
  min="1980-01-01"
  max="2000-01-01">

External CSS

  1. https://tim-montmorency.com/timdoc/shared/styles/codepen.css
  2. https://tim-montmorency.com/timdoc/shared/styles/codepen-form.css

External JavaScript

This Pen doesn't use any external JavaScript resources.