I thought of this two, but the thing is, is that the 47 is made from elongated material signifying a "type" of entity, the 8 is made of shells, and the 6 of rocks. The time was taken to do this for a reason.
Tan 8 sand shells = Tonight send shells
6 made of rocks = Rock 47's Six with shells from a formation to be created because formations appear.
This is why I do not think it was about Day of Days, except for plausible deniability. Remember, it took efforts to create all three groups of numbers.