You situation is not an uncommon one. We all have our own lives that at times gets difficult to manage. Then you add all the stresses of the holiday season and for many it becomes completely unmanagable. The holidays do affect each of us in a unique way.
You did not provide many details on the age or health of your parents or whether they are healthy or ill. Do you think any of those factors may be the reason why your siblings have chosen to not share their holidays with your parents? Maybe if they are sick it is difficult for them to deal with that. Or maybe if they are very senior that your siblings are having a hard time facing that. There are so many reasons why they may be keeping their distance. Maybe an open honest conversation might be warranted. The one thing I can say from personal experience is that you cannot "make" anyone want to spend time with someone. That has to come from the heart.
Missy also gives some great suggestions. It isn't so much about the day but the reason for the celebration. Maybe celebrating before or after the holidays may be best for the family. Finances may be better; spirits may be happier and the stresses of the holiday will be gone.
However it turns out, if it is important to you to be with your parents then go ahead and do it. You do not want to regret missing any time spent with them because of someone else's reasons for not being able to participate. You enjoy every minute you can with them and make them happy in any way that you can. They will cherrish that!