Ganesh Chaturthi will be celebrated on the 11th of September, this year.
Those conversant with Yoga would know that the 'Kundalini Shakti' or primordial energy, rises in a zigzag manner through the Spinal chord, culminating in the third eye, which resides in between the eye-brows. When the trunk of Ganeshji is facing straight forward, it signifies that the passage, though the Spinal chord, or 'Sushumna' is entirely open. When the trunk of Ganeshji is swung right in the air, it means that the 'Kundalini Shakti' has reached the Sahasraar' or the Region of the third eye, permanently.

When Ganeshji's trunk is curved to the right. He is called Siddhi Vinaayak.

Read more, click:

http://www.dalsabzi.com/Language_Festivals/ganesh_chaturti.htm