Birthday is the day when I was born. My  birthday is in November. My mom’s birthday is Christmas Eve, and my father’s  birthday is in March. My brother’s birthday is in January. My brothers don’t know  my birthday, but I like my birthday. Some of my friend’s birthdays are in  January, first. I think they are lucky. My birthday is November, twenty. My  birthday is late, but my brothers birthday is early. I don’t like the fact that  my birthday is late, but I like my birthday, because birthdays are the day we were  born, and I get presents.

  Student's sentence            Corrected sentence            Grammar explanation          Better sentence     

Student’s Sentence: Birthday is the day when I was born.
Corrected Sentence: A birthday is the day when a person is born.
Grammar Explanation: We use “A birthday” to make the sentence general, not about one specific person.
Better Sentence: A birthday is the day when a person celebrates the day they were born.

Student’s Sentence: My brothers don’t know my birthday, but I like my birthday.
Corrected Sentence: My brothers don’t remember my birthday, but I like my birthday.
Grammar Explanation: “Don’t know” sounds unnatural here; “don’t remember” is more appropriate in this context.
Better Sentence: My brothers don’t remember my birthday, but I still like it.

Student’s Sentence: I don’t like the fact that my birthday is late, but I like my birthday because birthdays are the day we were born, and I get presents.
Corrected Sentence: I don’t like the fact that my birthday is late, but I like my birthday because a birthday is the day a person was born, and I get presents.
Grammar Explanation: We correct “birthdays are the day we were born” to a general definition using singular form for clarity.
Better Sentence: I don’t like that my birthday is late, but I still like it because a birthday is the day a person was born and I get presents.

Better Paragraph:
A birthday is the day when a person is born. My birthday is in November. My mom’s birthday is on Christmas Eve, and my father’s birthday is in March. My brother’s birthday is in January. My brothers don’t remember my birthday, but I still like it. Some of my friends’ birthdays are on January 1st. I think they are lucky. My birthday is on November 20th. My birthday is late, but my brothers’ birthdays are early. I don’t like that my birthday is late, but I still like it because a birthday is the day a person is born and I get presents.