wekan/client/components/cards/cardTime.styl

.card-time
  display: block
  border-radius: 4px
  padding: 1px 3px
  color: #fff

  background-color: #dbdbdb
  &:hover, &.is-active
    background-color: #b3b3b3

  time
    &::before
      font: normal normal normal 14px/1 FontAwesome
      font-size: inherit
      -webkit-font-smoothing: antialiased
      content: "\f017"  // clock symbol
      margin-right: 0.3em