month

A year is divided into twelve months, starting with January and ending with December. If it takes you a month to read a book, it takes approximately thirty days.

A month is a unit of time that corresponds to the phases of the moon — which is the reason the word month, which comes from the Proto-Germanic menoth, is closely related to the word moon, whose root is menon. People have kept track of days this way since Paleolithic times, and even those who don't use the Gregorian, twelve-month calendar, still divide a year into months based on the moon.

Definitions of month
1

n one of the twelve divisions of the calendar year

“he paid the bill last month
Synonyms:
calendar month
Types:
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date
the particular day, month, or year (usually according to the Gregorian calendar) that an event occurred
Revolutionary calendar month
a month in the Revolutionary calendar
Gregorian calendar month
a month in the Gregorian calendar
Jewish calendar month
a month in the Jewish calendar
Islamic calendar month
any lunar month in the Muslim calendar
Hindu calendar month
any lunisolar month in the Hindu calendar
Vendemiaire
first month of the Revolutionary calendar (September and October); the month of the grape harvest
Brumaire
second month of the Revolutionary calendar (October and November); the month of mist
Frimaire
third month of the Revolutionary calendar (November and December); the frosty month
Nivose
fourth month of the Revolutionary calendar (December and January); the snowy month
Pluviose
fifth month of the Revolutionary calendar (January and February); the rainy month
Ventose
sixth month of the Revolutionary calendar (February and March); the windy month
Germinal
seventh month of the Revolutionary calendar (March and April); the month of buds
Floreal
eighth month of the Revolutionary calendar (April and May); the month of flowers
Prairial
ninth month of the Revolutionary calendar (May and June); the month of meadows
Messidor
tenth month of the Revolutionary calendar (June and July); the month of harvest
Thermidor
eleventh month of the Revolutionary calendar (July and August); the month of heat
Fructidor
twelfth month of the Revolutionary calendar (August and September); the month of fruit
Jan, January
the first month of the year; begins 10 days after the winter solstice
Feb, February
the month following January and preceding March
Mar, March
the month following February and preceding April
Apr, April
the month following March and preceding May
May
the month following April and preceding June
June
the month following May and preceding July
July
the month following June and preceding August
Aug, August
the month following July and preceding September
Sep, Sept, September
the month following August and preceding October
Oct, October
the month following September and preceding November
Nov, November
the month following October and preceding December
Dec, December
the last (12th) month of the year
Tishri
the first month of the civil year; the seventh month of the ecclesiastical year in the Jewish calendar (in September and October)
Heshvan
the second month of the civil year; the eighth month of the ecclesiastical year in the Jewish calendar (in October and November)
Chislev, Kislev
the third month of the civil year; the ninth month of the ecclesiastical year in the Jewish calendar (in November and December)
Tebet, Tevet
the fourth month of the civil year; the tenth month of the ecclesiastical year (in December and January)
Shebat, Shevat
the fifth month of the civil year: the eleventh month of the ecclesiastical year in the Jewish calendar (in January and February)
Adar
the sixth month of the civil year; the twelfth month of the ecclesiastic year in the Jewish calendar (in February and March)
Adar Sheni, Veadar
included seven times in every 19 years
Nisan, Nissan
the seventh month of the civil year; the first month of the ecclesiastic year (in March and April)
Iyar, Iyyar
the eighth month of the civil year; the second month of the ecclesiastical year (in April and May)
Sivan, Siwan
the ninth month of the civil year; the third month of the ecclesiastical year in the Jewish calendar (in May and June)
Tammuz, Thammuz
the tenth month of the civil year; the fourth month of the ecclesiastic year (in June and July)
Ab, Av
the eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August)
Ellul, Elul
the twelfth month of the civil year; the sixth month of the ecclesiastical year in the Jewish calendar (in August and September)
Moharram, Muharram, Muharrum
the first month of the Islamic calendar
Safar, Saphar
the second month of the Islamic calendar
Rabi I
the third month of the Islamic calendar
Rabi II
the fourth month of the Islamic calendar
Jomada I, Jumada I
the fifth month of the Islamic calendar
Jomada II, Jumada II
the sixth month of the Islamic calendar
Rajab
the seventh month of the Islamic calendar
Sha'ban, Shaaban
the eighth month of the Islamic calendar
Ramadan
the ninth month of the Islamic calendar; the month of fasting; the holiest period for the Islamic faith
Shawwal
the tenth month of the Islamic calendar
Dhu al-Qadah, Dhu'l-Qa'dah
the eleventh month of the Islamic calendar
Dhu al-Hijja, Dhu al-Hijjah, Dhu'l-Hijja, Dhu'l-Hijjah
the twelfth month of the Islamic calendar and the season of the hajj; has one extra day in leap years
Caitra, Chait
the first Hindu calendar month (corresponding to March in the Gregorian calendar)
Baisakh, Vaisakha
the second month of the Hindu calendar
Jeth, Jyaistha
the third month of the Hindu calendar
Asadha, Asarh
the fourth month of the Hindu calendar
Sawan, Sravana
the fifth month of the Hindu calendar
Bhadon, Bhadrapada
the sixth month of the Hindu calendar
Asin, Asvina
the seventh month of the Hindu calendar
Kartik, Karttika
the eighth month of the Hindu calendar
Aghan, Margasivsa
the ninth month of the Hindu calendar
Pansa, Pus
the tenth month of the Hindu calendar
Magh, Magha
the eleventh month of the Hindu calendar; corresponds to January in the Gregorian calendar
Phagun, Phalguna
the twelfth month of the Hindu calendar
date of reference, epoch
(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
Type of:
period, period of time, time period
an amount of time

n a time unit of approximately 30 days

“he was given a month to pay the bill”
Types:
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lunar month, lunation, moon, synodic month
the period between successive new moons (29.531 days)
anomalistic month
period between successive perigees; approximately 27.5546 days
sidereal month
period between successive conjunctions with a star, 27.322 days
solar month
one-twelfth of a solar or tropical year
Type of:
time unit, unit of time
a unit for measuring time periods

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