Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Monthly is regular. It follows the -ies Conversion rule.
Use plural verbs: "The monthlies are ready" (not "is ready").
Yes. The plural monthlies is standard across all English variants.
The word monthly follows the standard English pluralization rule. When forming the plural, monthly becomes monthlies. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why monthly becomes monthlies helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using monthlies in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The monthlies are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.