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abu_haxim
In the Hijri calendar, the name of the month has been written incorrectly. The month Jumādā al-Ūlā is mistakenly written as Jumādā al-Awwal, which is grammatically incorrect in Arabic. Since Jumādā is a feminine noun, the adjective that follows must also be feminine. Therefore, the correct form is Jumādā al-Ūlā, not Jumādā al-Awwal.
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Arabic Grammar Explanation (Clear & Precise)
  1. جمادى (Jumādā)
A feminine proper noun (اسم علم مؤنث).
The feminine ending ألف مقصورة (ى) marks it as feminine.
  1. Rule:
When a noun is feminine, its adjective (الصفة) must also be feminine.
➤ الموصوف المؤنث يجب أن يُوصف بصفة مؤنثة.
  1. The mistake:
الأوّل → masculine adjective (صفة مذكرة).
Using it after a feminine noun (جمادى) breaks the agreement rule.
  1. The correct form:
الأولى → feminine adjective (صفة مؤنثة).
Matches the noun جمادى → so the correct full name is:
جمادى الأولى
  1. Comparison:
❌ جمادى الأوّل → wrong (masculine adjective with feminine noun)
✔️ جمادى الأولى → correct (feminine adjective with feminine noun)