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