<label for="start">Start date:</label>

<input type="date" id="start" name="trip-start" value="2018-07-22" min="2018-01-01" max="2018-12-31" />

label {
  display: block;
  font:
    1rem 'Fira Sans',
    sans-serif;
}

input,
label {
  margin: 0.4rem 0;
}