Ganesh Chaturthi is celebrated as the birth anniversary of Lord Ganesh. On Ganesh Chaturthi, Lord Ganesh is worshipped as the god of wisdom, prosperity, and good fortune. It is believed that Lord Ganesh was born during Shukla Paksha of Bhadrapada month. Currently, Ganesh Chaturthi day falls in the month of August or September in the English calendar.
Ganesh Puja is preferred during Madhyahna as it is believed that Lord Ganesh was born during Madhyahna Kala. Madhyahna Kala is equivalent to midday according to the Hindu division of the day.
As per Hindu timekeeping, the time duration between sunrise to sunset is divided into five equal parts. These five parts are known as Pratahkala, Sangava, Madhyahna, Aparahna, and Sayankal. Ganapati Sthapana and Ganapati Puja on Ganesha Chaturthi are done during Madhyahna part of the day and as per Vedic astrology it is considered the most appropriate time for Ganesha Puja.
It is believed that one should not sight the moon on Ganesh Chaturthi. Sighting the moon on Ganesh Chaturthi creates Mithya Dosham or Mithya Kalank (कलंक) which means false accusation of stealing something.
As per Puranic legends, Lord Krishna was falsely accused of stealing precious jewels named Syamantaka. After seeing the plights of Lord Krishna, Sage Narada informed that Lord Krishna sighted the moon on the day of Bhadrapada Shukla Chaturthi, and because of that, he has been cursed with Mithya Dosha.
Depending on the start and end time of Chaturthi Tithi, sighting of the moon might be prohibited for two consecutive days. According to DrikPanchang.com rules, Moon should not be sighted while Chaturthi Tithi is prevailing. Further, Moon risen during Chaturthi should not be sighted even if Chaturthi Tithi gets over before the moonset.
Note: Some Images for the Website are Taken from Google.