Today DH found an invitation in our Kindergartener's backpack, opened it, checked the calendar, added the event and the details to the calendar (including what DD needs to wear) and RSVP'ed. He even texted the parents what the birthday boy is into.
My mind is blown. I had given up all hope that DH would do such a thing. I have no idea what inspired him to handle a task without any input from me or how to encourage it without sounding patronizing but I hope there's more where this came from. It felt amazing.