There are two Ekadashi fasting in a month, one during Shukla Paksha and another during Krishna Paksha
Masik Shivratri is celebrated on the 14th day of each month during the waning moon (Krishna Paksha) half
Purnima fasting is on the full moon day as it is considered very auspicious day for any type of worship.
Aaj Ka Panchang आज का पंचांग, राहुकाल के साथ सर्वार्थ सिद्धि योग,जानिए शुभ मुहूर्त
Amavasya is new moon day in Hindu calendar. It is significant day as many rituals are performed only on Amavasya Tithi
Shradh Paksha is a period during which people perform special rituals for the well being of their late ancestors