Sunsets and sunrises as seen from different places in Hawaii and elsewhere. Technically, sunsets occur when the sun disappears below the horizon and before dusk.
However, I'll take some poetic license and consider anytime the sun is near the horizon as a sunset or a sunrise.

Do you know why the sunsets tend to be red especially near beaches and after volcanc eruptions?

"When incoming sunlight encounters a heavy concentration of particles in the atmosphere, the shorter wavelengths of light (violet and blue) are scattered away, resulting in a red sunset. Red sunsets are often observed from a beach because of the high concentration of salt particles suspended in the air over the oceans. These particles effectively scatter shorter wavelengths of light, producing red sunsets. Dust and ash particles injected into the atmosphere by volcanic eruptions can also cause red sunsets."

Not very romantic, eh?