A word which contains the capitalization error is 'sunday'.
Punctuation is used to structure and organize the writings. It helps in making more sense and clarity in the sentence.
Capitalization is a punctuation which refers to the use of an upper case or capital letter of the first letter in a word. There are certain rules that have to be followed to capitalize a letter:
- The first word of the sentence and the letter after a period is capitalized.
- Proper nouns are capitalized – example: brand names, days of the week and month, country, people place and so forth.
- Titles are capitalized.- The president, The chairman.
Hence, the first letter of the Sunday is capitalized because it is a proper noun.