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
Day has two meanings: 24-hour period and sunrise-sunset time. Times are expressed using specific phrases and vocabulary words
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
Morning is from sunrise to noon. Afternoon is from noon to evening. "Good afternoon" is used from 12:01 pm to 5:59 pm. "Good evening" is used from 5:00 pm to 10:59 pm