Ganesha Chaturthi or Vinayaka Chaturthi is observed in the month of Bhadrapada, as per the Hindu Calendar.
It falls on the shukla chaturthi (fourth day of the waxing moon period) day and corresponds to the month of between 16th August to 15th September in the English Calendar. The festival lasts for 10 days, ending on Anant Chaturdashi (fourteenth day of the waxing moon period).
In 2013, Ganesha Chaturthi falls on Monday, the 9th of September. Ganesha Chaturthi puja is now available in multiple Indian scripts (Thanks to Aksharamukha transliterator).
We also have the Jaya Ganesha Arati and the Sukha Karta Arati available here.
The Ganapathy Homam and Gowri Vrata puja can be accessed from these separate posts
Please see the links below for the pdf file of your choice:
The Panchang details are available at the Puja Calendar page http://mantraaonline.com/satsangh-calendar/ – Please update your files accordingly.