Also, what a happy coincidence that - probably for the first time in the history - Nowruz concurring with two other important, and exciting days: The International Day of Happiness and Spring Equinox.
Here's an excerpt of the article on CNN:
One of most famous of Nowruz traditions among Afghans is to forget and forgive mistakes of one another and start the New Year with new hopes and new goals. During the first three days of the year, families and relatives meet and visit each other’s houses. These are parts of Afghan traditions that date back centuries. For further reading please go the main article.