Silla (month) and Maha Shivaratri (Nepal Bhasa: सिला चह्रे "Silā Charhe") on the 14th day of the dark fortnight. Shree Panchami is the first day of spring while Shivaratri honors the Hindu deity Shiva. On the full moon day, the month-long Swasthani sacred story reciting festival ends. Silla (month) Sillā (Nepal Bhasa: सिल्ला) is the fourth month in the Nepal Era calendar, the national lunar calendar of Nepal. The month corresponds to Magha (माघ) in the Hindu lunar calendar and February in the Gregorian calendar. Sillā begins with the new moon and the full moon falls on the 15th of the lunar
Month on the initial approximation that 2 lunations last 59 days: a 30-day full month followed by a 29-day hollow month — but this is only roughly accurate, and eventually needs correction by using larger cycles, or the equivalent of leap days. Additionally, the synodic month does not fit easily into the year, which makes accurate, rule-based lunisolar calendars complicated. The most common solution to this problem is the Metonic cycle, which takes advantage of the fact that 235 lunations are approximately 19 tropical years (which add up to not quite 6940 days). However, a Metonic calendar will drift against the