Should we celebrate my mom's birthday?

Hi - my mom's vascular dementia has been progressing and she's sleeping a lot more often. Her birthday is this week, and I don't know whether to celebrate, or if so, 'how much' to celebrate. When I mentioned to her last night about us coming to visit her for her birthday, she just said 'oh, ok' and then closed her eyes again. I'm afraid to make too much of a fuss because then she'll be sad and want to go home for her birthday. Yet I can't 'not' celebrate it....unsure of what to do. I realize that regardless of what we do, the next day she probably won't remember. I just don't want to upset her in any way. Any suggestions??