(a) Ikrimah narrates from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he used to say takbir from the morning of Arafah until Asr on the last of the days of Tashriq.
(b) Al-Hakam mentioned the same, but with an addition: he would say takbir at the Asr prayer, but stop at the Maghrib prayer.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة العيدين / 6276