Maha Navami, the ninth day of Sharadiya Navratri dedicated to Goddess Durga’s form Siddhidatri, is observed in 2026 on Monday, October 19, with its start determined by the Hindu tithi calendar. Sources agree it is linked to the culmination of Durga’s victory over Mahishasura and is followed by day-of rituals including Durga puja, offerings, and in many households worship of young girls (kanya puja).

Multiple outlets also note that Maha Ashtami and Maha Navami overlap in timing because the Ashtami tithi spans parts of two dates. The Ashtami tithi begins at 8:27 AM on October 18 and ends at 10:51 AM on October 19, when Navami begins. As a result, some traditions perform Ashtami puja on the evening of October 18, while others conduct it on the morning of October 19 before Navami starts.

Local customs and regional variations can lead to different choices for when to hold kanya pujan and related observances, but the underlying panchang timings for the tithi crossover are consistently reported.