Skip to content

30rd or 30th – Which is Correct?

When it comes to expressing dates, the confusion between “30rd” and “30th” often arises. Many non-native English speakers find it challenging to determine which suffix to use when referring to the 30th day of a month. However, fear not! I am here to shed some light on this matter and clear up the confusion once and for all.

To put it simply, “30th” is the correct form to use when writing the ordinal number for the 30th day of a month. The suffix “-th” is used to indicate ordinal numbers, which refer to the position or order of something in a series. In this case, “30th” indicates that it is the thirtieth day of the month.

Let’s take a look at some examples to illustrate this further:

1. Today is the 30th of June.
2. My birthday is on the 30th of July.
3. She will be visiting us on the 30th of September.
4. The deadline for the project is the 30th of October.

In each of these examples, “30th” is correctly used to signify the specific day within the given month. By using this suffix, we can clearly and precisely communicate the date to others.

On the other hand, “30rd” is not a correct form to express the ordinal number for the 30th day. The suffix “-rd” is used for the ordinal numbers “3rd” (third) and “23rd” (twenty-third), but it is not applicable to other numbers such as “30” or “40”. So, it would be incorrect to write “30rd” as it does not follow the established grammar rules of English.

Consider the following examples to understand why “30rd” is incorrect:

1. Incorrect: Today is the 30rd of June.
2. Incorrect: My birthday is on the 30rd of July.
3. Incorrect: She will be visiting us on the 30rd of September.
4. Incorrect: The deadline for the project is the 30rd of October.

As you can see, the usage of “30rd” is grammatically incorrect and can lead to confusion and misunderstanding. It is important to adhere to the correct grammar rules to ensure effective communication.

In conclusion, when expressing the ordinal number for the 30th day of a month, “30th” is the correct form to use. By using this suffix, we can accurately convey the date and avoid any confusion. So, the next time you need to write the date correctly, remember to use “30th” with confidence. Happy writing!