The names of the twelve months must always be capitalized.
January
February
March
April
May
June
July
August
September
October
November
December
The shortest month of the year is February.
Summer vacation begins in June.
The fall festival is held every October.
Our first snowfall usually comes in December.
The summer month of July is a good time to travel.
My birthday falls in May.
It feels like January is a month for new beginnings.
Always capitalize the names of the twelve months.