Kamada Ekadashi is observed during the waxing phase of moon in March/April. It is said in the scriptures that observing Kamada Ekadasi will help in getting rid of sins and increasing virtue. The greatness of this Ekadasi fastingwas narrated to Yudhishtira by Lord Krishna and is mentioned in the Varaha Purana. In 2015, the date of Kamada Ekadashi is March 30.

Legend has it that a Gandharva was unable to perform his duties when his wife was not around. This Gandharva was overpowered by lust and thus failed in his duties and was cursed by a King to become a cannibal. The Gandharva and his wife roamed the forests and one day the wife came across a Sage, who advised them to undertake Kamada Ekadashi fasting for getting rid of the curse.

The Gandharva couple observed the Kamada Ekadashi and the husband was freed from the curse.

On the Ekadashi day, most Vishnu devotees fast and some devotees keep vigil at night. Those people undertaking partial fasting abstain from food made of rice.

source – http://www.hindu-blog.com/2009/04/kamada-ekadashi.html

SB 5.5.10-13 — O My sons, you should accept a highly elevated paramahaṁsa, a spiritually advanced spiritual master. In this way, you should place your faith and love in Me, the Supreme Personality of Godhead. You should detest sense gratification and tolerate the duality of pleasure and pain, which are like the seasonal changes of summer and winter. Try to realize the miserable condition of living entities, who are miserable even in the higher planetary systems. Philosophically inquire about the truth. Then undergo all kinds of austerities and penances for the sake of devotional service. Give up the endeavor for sense enjoyment and engage in the service of the Lord. Listen to discussions about the Supreme Personality of Godhead, and always associate with devotees. Chant about and glorify the Supreme Lord, and look upon everyone equally on the spiritual platform. Give up enmity and subdue anger and lamentation. Abandon identifying the self with the body and the home, and practice reading the revealed scriptures. Live in a secluded place and practice the process by which you can completely control your life air, mind and senses. Have full faith in the revealed scriptures, the Vedic literatures, and always observe celibacy. Perform your prescribed duties and avoid unnecessary talks. Always thinking of the Supreme Personality of Godhead, acquire knowledge from the right source. Thus practicing bhakti-yoga, you will patiently and enthusiastically be elevated in knowledge and will be able to give up the false ego.

SB 5.5.14 — As I have advised you, My dear sons, you should act accordingly. Be very careful. By these means you will be freed from the ignorance of the desire for fruitive activity, and the knot of bondage in the heart will be completely severed. For further advancement, you should also give up the means. That is, you should not become attached to the process of liberation itself.

Day 9)     Shri Siddhidatri Devi

Mantra:- OM HREEM SHRI SIDDHIDATRI DURGAAYE NAMAHA

Chant 108 times above mantra in addition chant her most divine bija mantra 108 times

“OM HREEM DUM DURGAAYEI NAMAHA”

Day 9)     Shri Siddhidatri Devi

Mantra:- OM HREEM SHRI SIDDHIDATRI DURGAAYE NAMAHA

Chant 108 times above mantra in addition chant her most divine bija mantra 108 times

“OM HREEM DUM DURGAAYEI NAMAHA”

Day 8)     Shri Maha Gauri Devi

Mantra:- OM HREEM SHRI MAHA GAURI DURGAAYE NAMAHA

SARAVA MANGALA MANGALYE SHIVE SARVARTHA SADHIKE

SHARANYEI TRYMBAKE GAURI NARAYANI NAMOSTHUTE

Chant 108 times above mantra in addition chant her most divine bija mantra 108 times

“OM HREEM DUM DURGAAYEI NAMAHA”

Day 8)     Shri Maha Gauri Devi

Mantra:- OM HREEM SHRI MAHA GAURI DURGAAYE NAMAHA

SARAVA MANGALA MANGALYE SHIVE SARVARTHA SADHIKE

SHARANYEI TRYMBAKE GAURI NARAYANI NAMOSTHUTE

Chant 108 times above mantra in addition chant her most divine bija mantra 108 times

“OM HREEM DUM DURGAAYEI NAMAHA”

Day 7)     Shri KAALA RATRI DEVI (Shubhamkari)

Mantra:- OM HREEM SHRI KAALA RATRI  DURGAAYE NAMAHA

Chant 108 times above mantra in addition chant her most divine bija mantra 108 times

“OM HREEM DUM DURGAAYEI NAMAHA”

Day 7)     Shri KAALA RATRI DEVI (Shubhamkari)

Mantra:- OM HREEM SHRI KAALA RATRI  DURGAAYE NAMAHA

Chant 108 times above mantra in addition chant her most divine bija mantra 108 times

“OM HREEM DUM DURGAAYEI NAMAHA”

Day 6)     Shri Katyayani Devi

Mantra:- OM HREEM SHRI KATYAYANI DURGAAYE NAMAHA

Chant 108 times above mantra in addition chant her most divine bija mantra 108 times

“OM HREEM DUM DURGAAYEI NAMAHA”

Day 6)     Shri Katyayani Devi

Mantra:- OM HREEM SHRI KATYAYANI DURGAAYE NAMAHA

Chant 108 times above mantra in addition chant her most divine bija mantra 108 times

“OM HREEM DUM DURGAAYEI NAMAHA”