July has 31 days and is one of the clearest cases of a month named after a real historical figure: it was renamed from the earlier Roman name Quintilis in honor of Julius Caesar, marking the month of his birth. The renaming happened after Caesar’s calendar reform introduced the Julian calendar, the ancestor of the modern Gregorian calendar still used today.
In the Northern Hemisphere, July usually brings the hottest weather of the year, sitting squarely in the middle of summer with long days and warm nights. In the Southern Hemisphere, July is the depth of winter, often the coldest month of the year in countries like Australia, Chile, and South Africa.
July is also notable for national holidays tied to independence and founding events in several countries — for example, Independence Day in the United States falls on July 4th, and Canada Day is celebrated on July 1st. With summer in full swing across the Northern Hemisphere, July is commonly a peak month for vacations, outdoor festivals, and school holidays.