This noun follows the standard English plural rule: simply add -s to the singular form.
Birthday is regular. It follows the Standard -s rule.
Use plural verbs: "The birthdays are ready" (not "is ready").
Yes. The plural birthdays is standard across all English variants.
The word birthday follows the standard English pluralization rule. When forming the plural, birthday becomes birthdays. This follows the Standard -s pattern, which is one of the most common plural rules in English.
Understanding why birthday becomes birthdays helps with spelling and pronunciation. This noun follows the standard English plural rule: simply add -s to the singular form.
When using birthdays in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The birthdays are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.