Incorrect spelling, explanation: the ordinal number two is made from figure 2 and two letters that occur at the end of the word second. It means that it should be written 2nd, not 2rd. Some learners can make a mistake because rd is added to number 3, indicating the third position of something. Therefore, the correct spelling is 2nd and 3rd but 2rd is incorrect.

Correct spelling, explanation: the number two in the figure with two letters nd indicates the second position of the objects. The word second comes from Latin as secundus, then it appeared in Middle English as secund where at the end of the word also there are the letters nd. We conclude that the letters nd indicate the second ordinal number and therefore, solely 2nd is correct. 2rd is incorrect because rd indicates the third ordinal number.

Definition of 2nd:
2nd – the ordinal number, showing that an object occurs in the second position which means it is the next to the first,
I will travel to London on the 2nd of May 2023.
February is the 2nd month of the year.
John is her 2nd husband.

Incorrect spelling

Incorrect spelling