Vinayaka spelling: Sadasivalingeswara/r (South Indian style, optional).
We will celebrate Shivaratri as usual without much fanfare at our home puja enclosure, though it used to be the most important festival for Kashmiri brahmins.. It could have been something like 16'x11', but my son did not agree to my planning, Ishwareccha, so to say. Wife, the religious motivator in the family will have a full-day fast (I will ask her for further details).
Shiva is my friend, he is always in my heart along with all other Gods and Goddesses (that does not mean that I am not an atheist), but does not ask me to fast, he knows me better than I know myself. At least my wife and daughter-in-law will visit the neighborhood Shiva temple if not my son and grandsons.
I have described it earlier also. We Kashmiris play a small skit on Shivaratri. At midnight, the door of the house is closed but an elder family member remains outside. Then he would knock on the door. Chidren inside will ask as to who is there. The person will reply in a gruff voice "Ram Braur" (Rama, the cat). Then the children would ask as to what he has brought. 'Ram Braur' then enumerate all good things, health, prosperity, etc., including presents and sweets for children. With that assurance the door is opened and 'Ram braur' enters in. I do not understand why did they add 'Ram braur' in the proceedings.
BTW, it is my elder grandsons 18th birthday the day after tomorrow. Yeah, once in a life happening. (Today it was my daughter-in-law's birthday)
Namah Shivaya.
Details: Whole day fast. Non-cereal things, milk, tea, fruits allowed. Potato, Sweet Potato, sago, lotus seeds, water chestnut, buckwheat preparations allowed, if someone is really hungry. My wife manages without much.