There is no fixed answer to that, for a number of reasons. Every day has different sunrise and sunset times. It also depends on where on the planet you are. There are also different interpretations of when spring starts and ends.
Water-Skiing
Navigation lights.
In the spring, the time of sunset varies depending on the location and the date. On the spring equinox, the sunset is approximately 12 hours after sunrise. You can check a reliable source like a weather website or app for the specific sunset time in your area during the spring.
All around white light must be displayed between sunset and sunrise.
At the north pole, there was no sunrise on that date. At the south pole, there was no sunset. Anywhere in between, the times of sunrise and sunset depended on the latitude of the location.
The should comply with IRPCS and be on between sunset and sunrise and in restricted visibility
No. Sunrise and sunset are only at the same time in countries that are on the equator. Greece is not on the equator. I asked your question on ask.com and it said that today sunrise in Greece is at 6:23 AM and sunset is at 8:39 PM.
Yes, during the spring and fall equinoxes, there is a day when the duration between sunrise and sunset is approximately 12 hours. This occurs because the Earth's axis is tilted neither towards nor away from the sun, resulting in equal day and night lengths.
Night is the period of time between sunset and sunrise.
That it's dark and that it occurs between sunset and sunrise.
"daylight" (hours)
The hours between sunrise and sunset.