Dear Pavithra,
You have checked some wrong website i hope. Except Ekadashi you can perform on any days ashlesha pooja. And sarpasamskara you can book it online as well best thing book it before now itself.
Temple website. http://kukketemple.com/index.html
ESeva website: – https://eseva.kukke.org/
GOD BLESS!!!
Srinivasa Temkar