Is it 30th or 30st? twenty-first = 21st (It's her 21st on Sunday.) Remember, no space between hyphen and words. Spelling rules with whole numbers - 20th, 30th, 40th... 30th = thirtieth (It's her thirtieth birthday.)
AOL: These 30th Birthday Party Ideas Are Perfect for Bringing in a New Decade
These 30th Birthday Party Ideas Are Perfect for Bringing in a New Decade
Yahoo: The Best 30th Birthday Gifts Ideas for All Types of Women and Budgets
Whether or not '90s babies are happy about leaving behind the escapades of their 20s, entering a new decade calls for a celebration, and the best 30th birthday gift ideas can be hard to think up.
The Best 30th Birthday Gifts Ideas for All Types of Women and Budgets
AOL: Celebrate a New Milestone With One of These 30th Birthday Ideas
"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." A 30th birthday party is the perfect opportunity to throw an event with a little bit of edge—and a ...
The correct way to write the ordinal form of thirty is 30th, not 30rd. When forming ordinals in English, the last two letters of the written word determine the ending.
Incorrect spelling, explanation: this form, 30st, is a mistake because the suffix used to create ordinal numbers is the one that word forms of these numbers end with. Therefore thirtieth is 30th and thirty-second is 32nd. This means the only correct form here is 30th.
To summarize, when expressing the date as “30th,” it is crucial to use the correct ordinal suffix. Avoid the incorrect term “30st,” as it violates established grammar rules.