I'm new here.
There are no coincidences. However the following could be a simple typo for the calendar year '2017', making my conclusion invalid.
The POTUS Tweet to celebrate the life of Barbara Bush has been reissued with a edit of the picture (aka statement) that REMOVES the timestamp April 17, 2017 inside it.
Recent: https:// twitter.com/realDonaldTrump/status/986430103075868672
Archives: http:// web.archive.org/web/20180418001121/https:// twitter.com/realDonaldTrump/status/986395361815166981
https:// s3.amazonaws.com/rdt-tweets/986395361815166981.jpg
Archived picture is attached with highlights.
It has THREE number signs symbols (aka ###) at the bottom which might refer to the THREE #17's in the form of two 17th letter 'Qs' and 17th word 'Trump'.
I believe I am missing something to make a real connection between that Trump tweet and a Q drop, as both previous [17.] and [#17] relate to 'plane'.
For now, my conclusion is that POTUS is signaling to this board that TEAM TRUMP AND Q are still a dynamic duo/team until a possible related future drop occurs.
God Bless!