No, the longest day of the year typically falls on or around June 21st in the Northern Hemisphere, which is known as the summer solstice. On this day, the Northern Hemisphere is tilted towards the Sun at its maximum angle, resulting in the longest period of daylight. Conversely, in the Southern Hemisphere, June 21st marks the winter solstice, which is the shortest day of the year with the least amount of daylight.
However, it's important to note that the precise date of the summer solstice can vary slightly from year to year. The actual date may range from June 20th to June 22nd due to slight variations in Earth's orbit and axial tilt. Therefore, while June 21st is often considered the longest day, it's advisable to consult specific astronomical references or calendars for the exact date of the summer solstice in a given year.