Monday (pron. ) is a day of the week between Sunday and Tuesday.
The English noun Monday derived sometime before 1200 from monedæi, which itself developed from Old English (around 1000) mōnandæg and mōndæg (literally meaning "day of the moon"), which is cognate to other Germanic languages, including Old Frisian mōnadeig, Middle Low German and Middle Dutch mānendach (modern Dutch Maandag), Old High German mānetag (modern German Montag), and Old Norse mānadagr (Swedish måndag, and Danish and Norwegian manadag). The Germanic term is a Germanic interpretation of Latin lunae dies ("day of the moon").
The Russian word, eschewing pagan names, is понедельник (poniediélnik), meaning "after Sunday." In most of the Indian Languages, the word for Monday is Somvar, with Soma being the Sanskrit name for the moon. The Japanese word for Monday is getsuyōbi (月曜日) which means day of the moon.
But according to the Judeo-Christian count, Monday is the second day, the first being Sunday. This is also the standard format in Canada and the United States. Its name in Arabic, Armenian, Georgian, Greek, Hebrew, Persian, Portuguese and Syriac means "second day". Quakers also traditionally refer to Monday as "Second Day" eschewing the pagan origin of the English name "Monday". For similar reasons the official liturgical calendar of the Roman Catholic Church refers to Monday as "Feria II". (The Portuguese name for Monday reflects this, as do all the days' names except Saturday and Sunday: the Portuguese word for Monday is segunda-feira.)
Modern culture usually looks at Monday as the beginning of the workweek, as it is typically Monday when adults go back to work and children back to school after the weekend. Thus, Mondays are often seen as a misfortune. In Middle Eastern countries, however, the beginning of the workweek is usually Saturday (Thursday and Friday are observed as the weekend). In Israel, Sunday is the first day of the workweek. Friday is half a work day and Friday night and Saturday are the Sabbath.
In Judaism the Torah is read in public on Monday mornings, and special penitential prayers are said on Monday, unless there is a special occasion for happiness which cancels them.
In the Eastern Orthodox Church Mondays are days on which the Angels are commemorated. The Octoechos contains hymns on this theme, arranged in an eight-week cycle, that are chanted on Mondays throughout the year. At the end of Divine Services on Monday, the dismissal begins with the words: "May Christ our True God, through the intercessions of his most-pure Mother, of the honorable, Bodiless Powers (i.e., the angels) of Heaven…". In many Eastern monasteries Mondays are observed as fast days; because Mondays are dedicated to the angels, and monks strive to live an angelic life. In these monasteries the monks abstain from meat, fowl, dairy products, fish, wine and oil (if a feast day occurs on a Monday, fish, wine and oil may be allowed, depending upon the particular feast).
In the folk rhyme, "Monday's child is fair of face".
In Thailand, the color associated with Monday is yellow, see Thai solar calendar
The Boomtown Rats have a famous song called "I Don't Like Mondays".
Through the movie Office Space the quote "Someone is having a case of the Mondays!" entered the pop culture lexicon.
In the Garfield Comics and Shows, one of the things Garfield hates is Monday
| Language | Pronunciation | Meaning | Notes |
|---|---|---|---|
| Latin | dies lunae | Day of the moon | (literal translation) |
| Albanian | E Hane | Day of the moon | (literal translation) |
| Italian | lunedì | Day of the moon | (literal translation) |
| Galician | luns | Day of the moon | (literal translation) |
| Catalan | dilluns | Day of the moon | (literal translation) |
| Spanish | lunes | Day of the moon | (literal translation) |
| French | lundi | Day of the moon | (literal translation) |
| German | Montag | Moon day | (literal translation) |
| English | Monday | Moon day | (literal translation) |
| Hungarian | hétfő | head of seven (=week) | beginning of the week |
| Russian | Понедельник Ponedel'nik | after the week | (literal translation) |
| Polish | Poniedziałek | after Sunday | (literal translation) |
| Kashubian | Pòniedzôłk | after Sunday | (literal translation) |
| Khmer | ថ្ងៃច័ន្ទ tngae chan | moon day | (literal translation) |
| Croatian | Ponedjeljak | after Sunday | (literal translation) |
| Bulgarian | Понеделник Ponedelnik | after Sunday | (literal translation) |
| Ukrainian | Понеділок Ponedilnok | after Sunday | (literal translation) |
| Czech | pondělí | after Sunday | (literal translation) |
| Serbian | Понедељак / Ponedelyak | after Sunday | (literal translation) |
| Slovak | Pondelok | after Sunday | (literal translation) |
| Slovenian | Ponedeljek | after Sunday | (literal translation) |
| Bosnian | Ponedjeljak | after Sunday | (literal translation) |
| Macedonian | Понеделник Ponedelnik | after Sunday | (literal translation) |
| Turkish | Pazartesi | after Sunday | (literal translation) |
| Kurdish | dúschem | second day | (literal translation) |
| Greek | Δευτέρα deutéra | the second (day) | (literal translation) |
| Arabic | الاثنين al-ithnayn | the second (day) | (literal translation) |
| Persian | دوشنبه do-schambe | the second day | (literal translation) |
| Hebrew | יום שני yom schenai | the second day | (literal translation) |
| Portuguese | segunda-feira | second (liturgical) celebration | (literal translation) |
| Chinese | 礼拜一 星期一 libaiyi xingqiyi | first day of the week | |
| Japanese | 月曜日 getsuyôbi | moon day | Japanese days are called by the names of celestial bodies, starting with sun and moon then five planets |
| Korean | 월요일 walyoil | moon day | |
| Hindi | सोमवार som-vaar | day of Soma | (literal translation) the sacrament/deity soma was associated with the moon as the moon's waxing symbolized the cup of soma filling |
| Malayalam | തിങ്കളാഴ്ച thingka-lazhtcha | day of the moon | moon-week |