While there is a Shivratri every month on the 13th night in the Krishna Paksha, Maha Shivratri, the Great Night of Shiva, comes in the Phalgun month and is celebrated with great spiritual fervour and enthusiasm every year. Unlike most Hindu festivals, it is primarily a night festival dedicated to Lord Shiva.
Ganesh Chaturthi, also called Vinayak Chaturthi, is one of the liveliest and brightest of Hindu festivals. Celebrated with devotion and enthusiasm, it is dedicated to and celebrated in honour of Lord Ganesha, the God of wisdom and prosperity, who is also known as Ganapati, Lord Vinayak, Vighnahartaa (the remover of all obstacles).