Whereas the former has 5 + 4 + 4 weeks per quarter, and the latter has 4 + 4 + 5 weeks per quarter, the Symmetry454 Calendar has a symmetrical 4 + 5 + 4 weeks per quarter, which is why it is named Symmetry454.
Dok prvi kalendar ima 5+4+4 tjedana u kvartalu a drugi 4+4+5, kalendar Symmetry454 ima simetrično raspodijeljena 4+5+4 tjedna, po čemu je i nazvan (nema razmaka između "Symmetry" i "454").