https://abukhadeejah.com/the-aqeeqah-eaten-by-the-family-and-distributed-how-to-calculate-first-and-seventh-day-birth/
The 'Aqeeqah is a Sunnah on the seventh day, to be eaten by the family and distributed to neighbours, friends and the poor. And how to calculate the first day and the seventh day – Shaikh Ibn Bāz