HEB: Haute Ecole de Bruxelles (French: High School of Brussels; Brussels, Belgium) HEB: Hindu Endowments Board (Singapore) HEB: Here Everything's Better: HEB: High Energy Biscuit: HEB: High-Energy Beam: HEB: High Efficiency Boiler: HEB: Health Evidence Bulletins: HEB: Heating Element Bank: HEB: Higher Education Bulletin (Kenya) HEB
Twilight is the time between darkness and sunrise in the morning, and sunset and complete darkness in the evening, when there is light outside, but the Sun is below the horizon. There are 3 types of twilight: civil, nautical, and astronomical. Dubai skyline in twilight.
though the term is subjective evening is typically understood to begin just before twilight sunset during the close of the standard business day 5 pm and extend until night typically astronomical sunset 9 pm afternoon is the time of day from 12 00 noon to depending upon context evening sunset or 4 00 or 6 00 pm its use is often quite subjective