wekan/client/components/cards/cardDate.jade

template(name="dateBadge")
  if canModifyCard
    a.js-edit-date.card-date(title="{{showTitle}} {{_ 'predicate-week'}} {{#if showWeekOfYear}}{{showWeek}}{{/if}}" class="{{classes}}")
      time(datetime="{{showISODate}}")
        | {{showDate}}
        if showWeekOfYear
          b
            | {{showWeek}}
  else
    a.card-date(title="{{showTitle}} {{_ 'predicate-week'}} {{#if showWeekOfYear}}{{showWeek}}{{/if}}" class="{{classes}}")
      time(datetime="{{showISODate}}")
        | {{showDate}}
        if showWeekOfYear
          b
            | {{showWeek}}

template(name="dateCustomField")
  a(title="{{showTitle}} {{_ 'predicate-week'}} {{#if showWeekOfYear}}{{showWeek}}{{/if}}" class="{{classes}}")
    time(datetime="{{showISODate}}")
      | {{showDate}}
      if showWeekOfYear
        b
          | {{showWeek}}