Den

afternoon - odpoledne

noun - the part of the day between lunch and dinner

early - časně, brzy

adverb - before the usual time, opposite of 'late'

evening - večer

noun - the part of the day before you go to bed, it starts at about 6 pm

hour - hodina

noun - a period of 60 minutes

late - pozdě

adverb - not in time

midnight - půlnoc

noun - 12 o'clock at night

minute - minuta

noun - 60 seconds, 1/60 of an hour

morning - ráno, dopoledne

noun - the part of the day after you get up and/or before lunch

night - noc

noun - the part of the day when people usually sleep

time - čas

noun - the passing of seconds, hours, days etc.