My suggestion (I'm a learner myself, so maybe someone else would like to correct or alter this further):
"My favorite holiday is Norouz, the Iranian new year. We celebrate the first days of spring and most of us, especially students and teachers, have about 13 days to spend with our family, relatives, and friends. During those days I can visit the people whom I haven't seen for a year and strengthen our good relations."
- For Teachers