Panjak or Khamse Mostargheh referred to the last five days of the year when the weather was so cold. Since the products were in danger of freezing, people went to the mountain and planned a celebration for the weather not getting worst.
During these five days, before the beginning of Norouz celebrations, ancient Persians hold celebrations for the end of a Solar Year and a broad welcome to the New Year.
One of the unique and interesting significance of this celebration is that philanthropist donate alms to the poor people of the society.