Hi, I'm Monica
In most families, one person is the calendar
In mine, it was me. Every birthday, every anniversary, every school event lived in my head, and if I didn't remember it, it didn't happen. Nobody assigns you that job. You just wake up one day and realize it's yours.
I've spent ten years building spreadsheet tools that take things out of moms' heads, and this tracker is pulled straight from my Family Boss Spreadsheet, the system I use to run my own household. It's yours, free. List your dates once and let it do the remembering.