Hour

The hour (symbol: h) is a unit of measurement used to measure time. The hour is equal to sixty minutes. Twenty-four hours are equal to one day. Unlike the second, the hour is not a base SI unit.

Hours of the day

Hours in arabic numerals	Hours in roman numerals	Period in english	Period in portuguese	Period in spanish	Period in french	Period in italian	Period in german
0	NULLA	Wee Hours Postmidnight Overnight	Madrugada	Madrugada	Après-minuit	Pomezzanotte	Nachmitternacht
1	I
2	II
3	III
4	IV
5	V
6	VI	Morning	Manhã	Mañana	Matin	Mattina	Morgen
7	VII
8	VIII
9	IX
10	X
11	XI
12	XII	Afternoon	Tarde	Tarde	Après-midi	Pomeriggio	Nachmittag
13	XIII
14	XIV
15	XV
16	XVI
17	XVII
18	XVIII	Evening	Noite	Noche	Soir	Sera	Abend
19	XIX
20	XX
21	XXI
22	XXII
23	XXIII