| [2017-01-20 Fri] |
  | <2017-01-30 Mon> |
  #+TBLFM: @2$1=@1$1+10

I put a inactive date at @1$1 and I want @2$1 would have +10 days from the
date, and want it to be inactive date, but it always shows active calendar
date form.

Is there a way to make it inactive date?