Days, months, and holidays will always be capitalized because they are proper nouns. Seasons generally aren’t capitalized unless they are personified.
Correct The maid comes on Thursdays and Sundays.
Correct My job interview is on Monday afternoon.
Correct Your birthday is in May, isn’t it?
Correct Thanksgiving is in November, Christmas is in December, and New Year’s is in January: North America has lots of winter holidays.
The four seasons are not capitalized unless they are used as proper nouns, such as when personified in creative writing or poetry. Consider the sentences below:
Correct My favorite season is spring.
Correct Lots of animals hibernate in the winter.
Correct So it’s the time of year again, when Winter blankets all creatures with slumberous snow and whispers to them, “Rest, children, rest.”
Typically speaking, days of the week and months of the year do get capitalized, but there are exceptions to the rule.
A little aside for our readers who love a bit of flourish and pizzaz in their life — custom pins are a great way to show off your love for the particular weekdays, months, or holiday with a stylish accessory. Whether you want to express your fondness for a particular day or simply show off your appreciation for the days of the week, months, or holidays, these pins are the perfect way to do so. With their vibrant colors and intricate designs, these enamel pins can be personalized to feature the names of all seven days of the week, names of the months or holidays. They are also a great gift for someone special, as they are a unique way to show your appreciation for the days of the week.