Is one sinful for not having slaughtered the 'aqiqah for his newborn daughter three months after her birth, and what is the solution?

The aqiqah is a confirmed Sunnah, not an obligation, and there is no sin upon one who neglects it, based on the Prophet's (peace be upon him) saying: "Whoever has a child born to him and wishes to perform a sacrifice on his behalf, let him do so." However, a Muslim should not neglect it, based on the Prophet's (peace be upon him) saying: "Every child is mortgaged by his aqiqah." It is permissible to slaughter it at any time if it is delayed beyond the seventh day. Giving money in charity does not take the place of the aqiqah, because its purpose is to draw closer to Allah through slaughtering.