Of course, keep in mind that the seasons in the Northern Hemisphere are the opposite of those in the Southern Hemisphere. This means that in places like Argentina and Australia, June is actually the beginning of winter. The winter solstice in the Southern Hemisphere is June 20 or 21, while the summer solstice, the longest day of the year, is December 21 or 22.

We have seasons because Earth is tilted on its axis relative to the orbital plane, the invisible, flat disc where most objects in the solar system orbit the sun. Earth's axis is an invisible line that runs through its center, from pole to pole. Earth rotates around its axis.

In June, when the Northern Hemisphere is tilted toward the sun, the sun's rays hit us for a greater part of the day than in winter. This means we get more hours of daylight. Conversely, in December, when the Northern Hemisphere is tilted away from the sun, there's fewer hours of daylight.

Seasons not only impact our vacation schedule but also have an enormous influence on vegetation and plant growth. If you need a laugh amidst this reality, a good vacation meme might lighten the mood and offer a humorous perspective on the changing seasons. Winter typically has cold weather, little daylight, and limited plant growth.

But in spring, plants sprout, tree leaves unfurl, and flowers blossom. Since summer is the warmest time of the year and has the most daylight, plants grow quickly during this time of year. But in autumn, temperatures drop, and many trees lose their leaves.

The four-season year, however, is typical only in the mid-latitudes; areas that are neither near the poles nor near the Equator. The farther north you go, the bigger the differences in the seasons. Helsinki, Finland, for example, sees 18.5 hours of daylight in the middle of June. In mid-December, however, there is daylight for less than 6 hours. Athens, Greece, on the other hand, is in southern Europe, and has a smaller variation—14.5 hours of daylight in June and 9.5 hours in December.

But whatever your summer is like, you should find something relevant on this list!