Muhammad bin Sirin says that gifts were brought to Sayyiduna Ali (may Allah be pleased with him) on the day of the festival. He asked: What is this? They said: O Commander of the Faithful, this is the day of the festival. He said: Make every day a "Fayruz". Abu Usamah said: He disliked even to say "Nayruz". The Shaykh says: This was only because of singling out one particular day, since the Shari'ah did not single it out.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجزية / 18865