HOW TODAY MEANS TOMORROW

Well they both begin with T obviously.
Actually they both begin with TO.
Then MORROW = morning = DAY
So TODAY really is TOMORROW when you think of it.
That leaves us with an opening for TODAY.

Even if you don’t want to go that way¹—
TOD and TOM are both guys’ names
and AY and ORROW both mean Yes (in Dutch)
(so in a way both TODAY + TOMORROW mean Yessir!)
which still leaves us with an opening for TODAY.

1 because for example you might say MORROW = morning = only part of DAY

  though MORROW being longer is the bulk 

  actually the gestalt of DAY.

  So it's okay.