I wanted to check if this is a mortal sin in my case… I’ll be confessing it anyway though
I feel really disappointed in myself because I missed today’s Mass, which is a Holy Day of Obligation. I was planning on going to it all week, but for some reason, I was sure it will be at 5 pm - because I thought I heard this at my parish. (I mean 5 pm on January 1st). But today, I checked the website, and saw that it was actually yesterday at 5, and today at 11 am which means that I missed it. This was unintentional but I still feel bad about it, I should have checked much earlier!
would you say this is a mortal sin? I’ll still confess it before receiving Communion but I just want to know.