ومن أسلم أو ولد بعد طلوع الفجر لم تجب فطرته
Translation: A person who converts or a baby born after Eid dawn has no fitrah liability for that Eid.
The second case concerns a child born after dawn on Eid: no fitrah for that Eid becomes due on the child’s behalf, because the child did not exist at the decisive moment.
If a child was born before Eid dawn, the earlier rule about minor children can apply when its other conditions are present.
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Sadaqat al-Fitr: Liability, Amounts, and Timing
ومن أسلم أو ولد بعد طلوع الفجر لم تجب فطرته
Translation: A person who converts or a baby born after Eid dawn has no fitrah liability for that Eid.
The second case concerns a child born after dawn on Eid: no fitrah for that Eid becomes due on the child’s behalf, because the child did not exist at the decisive moment.
If a child was born before Eid dawn, the earlier rule about minor children can apply when its other conditions are present.