<aside> ✅ Hit the Copy button in the upper-right corner of this code block. The formula can then be pasted in a Formula property.

</aside>

if(empty(prop("Parent Task")), "", "➞") + if(prop("Done") == true, "😀", if(empty(prop("Due")), "⚪️", if(formatDate(prop("Due"), "L") == formatDate(now(), "L"), "🟢", if(prop("Due") < now(), "🔴", "🔵"))))

Expanded

<aside> ✅ This expanded version of the formula is just for reference and learning.

</aside>

if(
  empty(
    prop(
      "Parent Task"
    )
  ),
  "",
  "➞"
) +
if(
  prop(
    "Done"
  ) =
= true,
  "😀",
  if(
    empty(
      prop(
        "Due"
      )
    ),
    "⚪️",
    if(
      formatDate(
        prop(
          "Due"
        ),
        "L"
      ) =
=
      formatDate(
        now(

        ),
        "L"
      ),
      "🟢",
      if(
        prop(
          "Due"
        ) <
        now(

        ),
        "🔴",
        "🔵"
      )
    )
  )
)