فَإِنْ حَدَثَ عُذْرٌ مَنَعَ النَّاسَ مِنَ الصَّلَاةِ فِي الْيَوْمِ الثَّانِي: لَمْ يُصَلِّهَا بَعْدَهُ.
Translation: If a valid impediment prevents the congregation from praying on that second day, Fitr is not performed thereafter.
In this exceptional case, communal Fitr prayer may be delayed only to the following day, not indefinitely. Eid al-Adha is treated differently under a valid impediment.