How to add a Countdown Timer to Squarespace

There are many ways to add a countdown timer to Squarespace.

Here I will share the free way using code from Codepen, but editing will be a bit difficult. To make editing style, layout, text, and numbers easier, you can use

Countdown Timer Widget (it has a free version)

Add Countdown Timer 01 Min

#1. Use this code to Custom CSS box

/* Countdown CSS */
.tpcontainer{
 & {
  color: #333;
  margin: 0 auto;
  text-align: center;
}

h1 {
  font-weight: normal;
  letter-spacing: .125rem;
  text-transform: uppercase;
}

li {
  display: inline-block;
  font-size: 1.5em;
  list-style-type: none;
  padding: 1em;
  text-transform: uppercase;
}

li span {
  display: block;
  font-size: 4.5rem;
  margin-bottom: 20px;
}
@media screen and (max-width:767px) {
  div#countdown ul {
    padding: 0px !important;
    display: flex;
    flex-direction: column;
}}}

Add Countdown Timer 02 Min

#2. Use this code to Code Injection > Footer

<script>
(function () {
  const second = 1000,
        minute = second * 60,
        hour = minute * 60,
        day = hour * 24;

  //I'm adding this section so I don't have to keep updating this pen every year :-)
  //remove this if you don't need it
  let today = new Date(),
      dd = String(today.getDate()).padStart(2, "0"),
      mm = String(today.getMonth() + 1).padStart(2, "0"),
      yyyy = today.getFullYear(),
      nextYear = yyyy + 1,
      dayMonth = "10/30/",
      birthday = dayMonth + yyyy;
  
  today = mm + "/" + dd + "/" + yyyy;
  if (today > birthday) {
    birthday = dayMonth + nextYear;
  }
  //end
  
  const countDown = new Date(birthday).getTime(),
      x = setInterval(function() {    

        const now = new Date().getTime(),
              distance = countDown - now;

        document.getElementById("days").innerText = Math.floor(distance / (day)),
          document.getElementById("hours").innerText = Math.floor((distance % (day)) / (hour)),
          document.getElementById("minutes").innerText = Math.floor((distance % (hour)) / (minute)),
          document.getElementById("seconds").innerText = Math.floor((distance % (minute)) / second);

        //do something later when date is reached
        if (distance < 0) {
          document.getElementById("headline").innerText = "It's my birthday!";
          document.getElementById("countdown").style.display = "none";
          document.getElementById("content").style.display = "block";
          clearInterval(x);
        }
        //seconds
      }, 0)
  }());
</script>

Add Countdown Timer 03 Min

#3. Edit the page where you want the Countdown Timer to appear > Add a Code Block > Paste this code.

<div class="tpcontainer">
  <h1 id="headline">Countdown to my birthday</h1>
  <div id="countdown">
    <ul>
      <li><span id="days"></span>days</li>
      <li><span id="hours"></span>Hours</li>
      <li><span id="minutes"></span>Minutes</li>
      <li><span id="seconds"></span>Seconds</li>
    </ul>
  </div>
</div>

Add Countdown Timer 04 Min