<div class="date">
  <div class="date__text">123</div>
</div>

body {
  background: #cc3366;
}
.date {
  position: relative;
  max-width: 50px;
  margin: 20px auto;
  padding: 30px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  filter: drop-shadow(1px 5px 20px rgba(34, 60, 80, 0.41));
  overflow: hidden;
  &__text {
    position: relative;
    z-index: 100;
    font-size: 18px;
    font-weight: 600;
  }
  &:before {
    content: "";
    display: block;
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
    height: 50%;
    background: radial-gradient(
        circle at 0 100%,
        rgba(0, 0, 0, 0) 8px,
        #fff 9px
      ),
      radial-gradient(circle at 100% 100%, rgba(0, 0, 0, 0) 8px, #fff 9px);
    background-position: bottom left, bottom right;
    background-position: bottom left, bottom right;
    background-size: 70% 100%;
    background-repeat: no-repeat;
  }
  &:after {
    content: "";
    display: block;
    position: absolute;
    width: 100%;
    bottom: 0;
    left: 0;
    height: 50%;
    background: radial-gradient(
        circle at 100% 0,
        rgba(0, 0, 0, 0) 8px,
        #fff 9px
      ),
      radial-gradient(circle at 0 0, rgba(0, 0, 0, 0) 8px, #fff 9px);
    background-position: top right, top left;
    background-position: top right, top left;
    background-size: 70% 100%;
    background-repeat: no-repeat;
  }
}