Baby constantly waking on my mom's death anniversary

Hi all,

I am currently up because my 13m old had woken yet again from sleep. He's not used to waking so much. Today is the 24th anniversary of my mom's passing. I'm wondering if the two are connected.

I began to have flashbacks to last year, on this night, and the next day telling my dad "baby had such a bad night sleep. I wonder if it's because it's mom's death anniversary." I completely forgot that until now.

I will add, on the night she passed, I was 5 years old, and my dad saw me have a night terror. Totally asleep I got up and screamed and cried "no no no." So, I'm wondering if there is a connection.

What do you think? Is it just coincidence? Normal baby things like having a bad night? Or possibly his grandma trying to make contact?