The symbol is based on the Greek letter epsilon (), with the first letter in the word Europe and with 2 parallel lines signifying stability. The ISO code for the euro is EUR. This is used when referring to euro amounts without using the symbol.

The sun always rises in the east and sets in the west. This consistent pattern is a fundamental aspect of Earth's rotation and its orbit around the sun. As the Earth rotates on its axis from west to east, the sun appears to move across the sky from east to west.

This phenomenon occurs because of the Earth's axial tilt and its orbit around the sun. The Earth's axis is tilted at an angle of approximately 23.5 degrees relative to its orbital plane. As a result, different parts of the Earth receive varying amounts of sunlight throughout the year, leading to the changing seasons.

During the day, the sun rises in the east as the Earth rotates, bringing sunlight to different regions of the planet. As the Earth continues its rotation, the sun appears to move across the sky, reaching its highest point (noon) before gradually setting in the west.

The direction of sunrise and sunset remains consistent due to the Earth's rotation and its fixed position in relation to the sun. While other factors such as atmospheric conditions and geographic location can affect the exact timing and appearance of sunrise and sunset, the general east-to-west movement of the sun is a constant phenomenon observed across the globe.