Be sure to capitalize all the days of the week, including "Sunday".
Be sure to capitalize all the days of the week, including "Sunday".
Last Sunday, Olivia and her husband went to church.
Last sunday, Olivia and her husband went to church.
When this noun is abbreviated (Sun.), capitalization is required as well.
She'll be there next Sun., 06:30.
She'll be there next sun., 06:30.
Similarly, we capitalize the plural form ("Sundays").
On Sundays, Peter prefers to escape the city and go fishing.
On sundays, Peter prefers to escape the city and go fishing.
Why do we need to capitalize "Sunday"? Since the days of the week are considered proper nouns in English, they start with a capital letter.
Where were you last Sunday?
When using date formats, keep also in mind that we need to add a comma after the day of the week.
Henry has a conference on Sunday, July 8.
Henry has a conference on Sunday, July 8.
Follow the same capitalization convention with the rest of the days of the week: