Morning spans from sunrise to noon. Afternoon continues from midday to evening. Evening extends from afternoon to night. Night begins from sunset to sunrise. Midnight is 12:00 AM, noon is 12:00 PM
Morning refers to the first part of the day, extending from dawn to noon. It can be used both literally and figuratively. The exact hours vary depending on who asks
Day has two meanings: 24-hour period or time between sunrise and sunset. AM is used for 00:01-12:00, PM for 12:01-24:00
A day consists of 24 hours divided into day and night. AM (ante meridiem) starts after midnight, PM (post meridiem) after noon. Every day begins exactly at 12 am
"In the morning" is correct for periods of daylight, not specific times. "At night" is used for dark periods, not specific times. "During the" or "in the" are used for all daylight periods
Aurora is Latin for dawn and Roman goddess of dawn. Name derives from Proto-Indo-European *haéusōs, meaning divine dawn. Has cognates in goddesses Ēṓs, Uṣas, Aušrinė, Auseklis and Ēastre