Can mother's day also be turn into grandma's day?

To me mother's day it's just like any other day. I only be cooking for my grandmother and bought her favorite classic tea set she been wanting for years. My dad does not spend time with my grandma so I always go every day to keep my grandma company. My grandma was almost like my mom as she raised me the first years of life. My mom does not deserve crap at all. I never wanted to celebrate mother's with her.
Can mother's day also be turn into grandma's day?
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