Musannaf Ibn Abi Shaybah 9999 — Fasting on Nawruz

Al-Hasan was asked about fasting on Nayruz, and he disliked it and said: "They glorify it." (Nayruz was the festival of the first day of the year among the Persians. Also, according to the solar calendar, they celebrated it as a day of joy on 21 March.)