Did the Vikings celebrated Halloween ?

Did the Vikings celebrate Halloween? The Norse warriors (and their children) certainly did not go trick or treating on the 31^st of October, but this was still an important day in the Norse calendar.

The end of October marks the end of the harvest season and the beginning of winter, which means long, dark days, especially in northern countries such as Scandinavia. Many cultures mark this date with special rituals, including the Vikings. In the Norse world, it was called Alfablot, or the festival of the elves.