Okay, picture this - you know how we divide time into days, weeks, months, and years, right? Well, a long, long time ago, in a place called Scandinavia, the people didn't have a calendar like we do now.
Instead, they used something called "runes" to keep track of time. Runes were like special symbols that stood for different things.
So, the people of Scandinavia used these runes to make their own special calendar. They would carve the runes on wooden sticks, stones or bones, and use them to keep track of the days, weeks, and months.
Each of the runes had a special meaning, just like how every day of the week has a different name and meaning. They used these runes to help them remember when important events like harvests or celebrations would happen.
Over time, the people made changes to their calendar, and eventually, they started using a different type of calendar, like the ones we use now. However, we can still learn about their old calendar and the runes they used through ancient writings and carvings that have been found.
So, that's what calendar runes are all about - using special symbols to keep track of time a long, long time ago in Scandinavia.