I was going to add "summer" on the 21st, but it would've been so packed.
Fathers Day - June 20th (founding fathers)
First Day of Summer - June 21st
That theory is speculation, just like my grapic. Neither were confirmed by Q, just trying to throw ideas out there. The only thing confirmed was the dod ip.
My graphic doesn't state that 11.4 is a date. I noted it as 11 months & 4 days.