What is the ruling on performing an 'aqiqah for non-twin siblings on a single day, and not on the 7th, 14th, or 21st day?

There is no objection to performing an 'aqiqah for non-twin siblings on the same day or on separate days. It is preferable for it to be on the seventh day of the newborn's life. If a father delays sacrificing the 'aqiqah for one of his children due to a reason, and then wishes to perform the 'aqiqah for that child and also for another child, this is permissible. The 'aqiqah for each newborn should be independent; for a male, two sheep, and for a female, one sheep.