Ayudha Puja is a Hindu festival that is celebrated on the ninth day of the bright half of the moons cycle of 15 days in the month of September/October, which is also known as Maha Navami. The festival is also called "worship of tools" or "Astra Puja" and is observed by Hindus across India. The festival is a time to honor and express gratitude for all the instruments that add meaning to our life, including small things like pins, knives, scissors, and spanners, as well as large devices such as computers, machinery, cars, and buses.

Ayudha Puja is a time to recognize and honor the utility of things in our life and to see the divine in everything, notably those things used in ones livelihood. The festival is also a time to become reverential towards your own body and mind, establishing a clear distance between what is you and what is your body, and what is your mind.

The festival has historical and mythological significance. According to Hindu mythology, the festival is connected to the killing of demon Mahushasura. The demon started massacring innocent people after receiving a boon from Lord Brahma that he could only be killed by a woman. Goddess Durga was then assigned the task to end Mahishasura. All the gods gave her their weapons to help her defeat the demon.

Ayudha Puja is celebrated in different ways across India. In Karnataka, Ayudha Puja is celebrated by the general public one day before the original festival day Vijayadashami (the Ayudha Puja Day). In Tamil Nadu, it is celebrated as Ayudha Pujai, in Telangana and Andhra Pradesh as Aayudha Pooja, in Kerala as Ayudha Puja, "Astra Puja" or "Ayudha Puja" in Odisha, "Shastra Puja" or "Ayudha Puja/ Khande Navami" in Maharashtra.

In conclusion, Ayudha Puja is a Hindu festival that is celebrated to honor and express gratitude for all the instruments that add meaning to our life. The festival is celebrated across India and has historical and mythological significance.