Masik Durgashtami, also known as Masik Durga Ashtami, is a significant Hindu observance dedicated to Goddess Durga. It falls on the eighth day (Ashtami) of the waxing phase (Shukla Paksha) of every month in the Hindu lunar calendar. However, the most widely celebrated Masik Durgashtami occurs during the month of Ashwin (September-October) and is known as Mahashtami during Navratri, a nine-night festival dedicated to the worship of Goddess Durga.

The significance of Masik Durgashtami lies in the worship of Goddess Durga, who symbolizes strength, power, and victory of good over evil. Observing this day is believed to bring blessings, prosperity, and protection from negative energies. Devotees perform various rituals, including fasting, offering prayers, conducting pujas (worship ceremonies), reciting hymns and mantras dedicated to Goddess Durga, and visiting temples.

During Navratri, the celebration of Mahashtami holds particular significance. On this day, devotees commemorate the victory of Goddess Durga over the buffalo demon Mahishasura, signifying the triumph of good over evil.

Masik Durgashtami is considered auspicious for seeking the blessings of Goddess Durga for courage, strength, and protection from obstacles and adversities in life. It's believed that observing fasts and performing sincere worship on this day can help devotees attain spiritual progress and fulfillment of their desires.

Overall, Masik Durgashtami serves as a recurring occasion for devotees to express their devotion to Goddess Durga and seek her divine blessings for well-being and success in life.