The date is an essential part of your story as it is for every story. In addition, this will allow you to access your story in chronological order! and make searches easier!
So when your children or grandchildren access your story space, everything will be in chronological order, from your birth until today.
To add a date to your story, just the information in the "When" (1) section.
For date formats accepted Famicity, hover your mouse over the "?" (2) section.