This is a suggested practice (#8) for the Calendar:

Consider Spinal Alignment and other curiosities

Did you notice that there are 24 Jieqi (solar nodes) and we have 24 vertebrae in our spine? The ancient Chinese noticed this connection and, believing all things were interconnected, aligned these seasonal nodes with the spine. I've included the diagram showing how each season links with the L (lumbar spine), T (thoracic spine), and C (cervical spine). Along these vertebrae, there are also moxa and acupuncture points that connect to specific internal organs—though depending on your interest, this might remain simply a fascinating observation for now.