Collection of Festivals on a Single Ekadasi

1. The famous tulsi vivah festival is performed on this day by some communities and also on the day after Ekadasi in some regions.
2. The chatur Mas Period also ends with this Ekadashi - Devotthan Ekadashi("god's awakening"), , also known as Prabodhini Ekadashi ("awakening eleventh"), Vishnu-prabodhini ("awakening of Vishnu"),Haribodhini - Utthana Ekadasi
3. The famous Kartik Month Pandarpur Yatra also concludes on the day.
4. On Utthana Ekadasi day, devotees also observe Bhishma Panchaka Vrata which is also known as Bhishma Panchakam

kaisika ekadasi Meaning / Blog / As Puranam / Drama / Temples / Links

https://www.google.com/search?q=kaisika+ekadasi

One More Name kaisika Due to Song Raga Composed by Airavata (Mount of Indra ) joyfully on Seeing Hanuman and Sung by Nambaduvan for Lakshmi Vishnu as In the Varaha Puranam, 
Also Known as Varaha Ekadasi https://www.youtube.com/results?q=varaha+ekadasi
Lord Vishnu tells the story to Mahalakshmi about how he adores being worshipped through dance and music.

This word kaisika has appeared first of all in Srimad Valmiki Ramayana in
the first canto of Sundara kanda [1:174] *sEvitE vAri-dhArAbhi:
patagaischa nishEvitE, charitE kaiSikAchAryai: airAvata nishEvitE*

Hanuman flew in the skies which had a number of waterfalls, and various
birds frequented. where the great order of gods or preceptors who were 
expert in singing the raga or svaras of kaisika cruised; where airavata or 
indra's elephant resorted to. Here 'kaisika' is already referred to as well 
known in treta yuga as a special kind of singing or raga or svara.

http://prtraveller.blogspot.com/2009/12/kaisika-puranam-in-thirukurungudi.html
http://www.antaryami.net/darpanam/index.php/essays/charithra/item/158-kaisika-ekadasi

Various Temples Celebration
https://www.google.com/search?q=Kaisika-Ekadasi-in-Vishnu-temples

5 Temples & 5 Nambhis of Thirukurungudi
http://ramanujadasan.wordpress.com/2010/05/08/5-temples-5-nambhis-of-thirukurungudi/

Glories
http://www.iskcondesiretree.net/page/utthana-ekadasi
http://www.salagram.net/ekadasi-24.htm