Navami is the Sanskrit word for "ninth", and is the ninth day in the lunar fortnight of the Hindu calendar. Each month has two Navami days, being the ninth day of the "bright" and of the "dark" fortnights respectively. From Wikipedia
The Ashtami tithi begins April 4 at 8:12 PM, with Kanya Pujan scheduled for April 6, marking the culmination of the nine-day festival dedicated to Goddess Durga.
