Capitalization

Here are some words you may not be capitalizing when you should:

• January and all the months.
• Monday and all the days
• Earth, Saturn, Venus and all the planets
• Rome, Athens, John, John Paul and all cities, place names and personal names
• A Freudian slip, a Shakespearean sonnet  and all adjectives derived form proper names 
• Coca Cola, Boeing, Pringles, Apple and all brand names
• Congress, Houses of Parliament, the Supreme Court and all institutes of state
• John Cabot University, Harvard, Columbia  and all academic institutes
• The Titanic, the Queen Mary and named structures made by humans
• Italians, Irish, Indians, African, American and all epithets of race, including when used adjectivally (an English breakfast, an Indian summer)
• Catholicism, Protestantism, Islam, Confucianism and all religions
• Fifth Avenue, the Strand and all names of roads and streets
• The American Revolution, the Enlightenment, the Renaissance and all historical epochs
• The Middle East, the Far East, Lincolnshire, Cook County, County Cork  and all geographical names
• Italy, France, Russia and all countries

.... and here are some words you are possibly capitalizing that you should not be:

• spring, winter, summer, fall, autumn, the equinox, the summer solstice
• the internet, the web, the dark web
• the euro, dollar, pound and all currencies
• north, south, east, west, north-west (unless referring to a specific, known geographical area such as Southeast Asia)
• the nineteenth, twentieth century and all other centuries
• the seventies, eighties and all other decades
• heaven, hell and wherever you're going after death
• hydrogen, helium, lithium and all the elements, including those named after a person
• the moon, the sun
• tuberculosis, autism and all conditions and diseases (but partly capitalize if named after a person (Hodgkin's disease)
• fir, larch, spruce, elm, maple (but Douglas fir), roses, daisies, ivy  and all plants
• president, chairman, moderator, speaker, minister - unless they are used as part of the title. So we write, Obama is the president of the United States, but then President Obama.