Sayyidah Umm Atiyyah (may Allah be pleased with her) said: the Messenger of Allah (peace and blessings be upon him) ordered us that "on the day of Eid, the young unmarried girls and the secluded women should go out." It was asked: And the menstruating women? He (peace and blessings be upon him) said: "Let them too witness the good and the supplication of the Muslims." A woman said: O Messenger of Allah, if one of us has no garment, what should she do? He (peace and blessings be upon him) said: "Let her companion clothe her with part of her own garment."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21567