Writing the date correctly in words is a fundamental skill that appears in everything from formal letters to legal documents. Specifically, expressing the numerical day of the month requires a clear understanding of how to convert numbers into their textual equivalents. The 30th day of any month presents a specific challenge because it ends with a "th" suffix, which follows different rules than simpler numbers like "one" or "two". This guide provides a detailed breakdown of how to write 30th in words, ensuring your writing is always polished and professional.
Understanding the Numerical Form
Before converting to words, it is essential to identify the exact number you are working with. The 30th is the final day of most months, representing the position of 30 in a sequence. It is numerically distinct from numbers like 20 or 13, as it sits at the end of the third decade of the month. Recognizing that the numeral is 30 is the first step in the conversion process, as this specific number has a unique name in the English language.
The Standard Spelling of 30
The word form of the number 30 is "thirty". This is the base word you will use when writing the date. Unlike numbers such as 21 through 99, which often require hyphens (e.g., twenty-one), 30 is a standalone word without internal punctuation. Mastering this basic spelling is crucial before you move on to adding the ordinal suffix that denotes its position in the month.
Adding the Ordinal Indicator
To transform the number into a date, you must indicate its order, turning "thirty" into "30th". In written English, this is done by adding the suffix "th" to the end of the word. Therefore, the 30th day of the month is written as "thirtieth". This follows the standard rule for ordinal numbers where numbers ending in 1, 2, or 3 usually take specific suffixes, but numbers ending in 0 default to "th" to maintain the flow of the word.
Examples in Date Context
When writing dates in full, the word "thirtieth" typically follows the name of the month. For instance, if an event occurs on the final day of April, you would write "April thirtieth". Similarly, for the last day of a meeting in December, the notation would be "December thirtieth". This format is universally recognized in formal writing and avoids the ambiguity sometimes caused by numerical dates.
Hyphenation and Grammar Rules
It is important to note that "thirtieth" is a single word and should never be hyphenated. You would not write "thirty-th" or "thir-tyth". When used in a sentence as an adjective before a noun, it generally does not require a hyphen unless it is part of a compound modifier directly preceding the noun. For example, "the thirtieth day" is correct, while "the 30th-day deadline" might use hyphens in specific stylistic guides, though "thirtieth day" remains the standard phrasing.
Common Mistakes to Avoid
One of the most frequent errors is confusing the spelling of the ordinal form. Writers might incorrectly try to phonetically spell "th" as "eth," resulting in "thirtyeth," which is incorrect. Another mistake is forgetting to change the "y" to "ie" when moving from the cardinal number (thirty) to the ordinal (thirtieth). Always double-check that the word ends in "ieth" to ensure grammatical accuracy in your documents.
