Monday instance of day of the week
Arrangement in the week
Historically, the Greco-Roman week began with Sunday (dies solis), and Monday (dies lunae) was the second day of the week.
It is still the custom to refer to Monday as feria secunda in the  liturgical calendar of the Catholic Church. 
Quakers also traditionally referred to Monday as "Second Day". The Portuguese and the Greek (Eastern Orthodox Church) also retain the ecclesiastical tradition (Portuguese segunda-feira, Greek Δευτέρα "deutéra" "second"). Likewise, the Modern Hebrew name for Monday is yom-sheni (יום שני).
While in North America Sunday is the first day of the week, the Geneva-based International Organization for Standardization places Monday as the first day of the week in its ISO 8601 standard.  Monday is xīngqīyī (星期一) in Chinese, meaning "day one of the week".Religious observances
Christianity
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).
The Church of Jesus Christ of Latter-day Saints spend one evening per week called Family Home Evening (FHE) or Family Night usually Monday, that families are encouraged to spend together in study, prayer and other family activities. Many businesses owned by Latter-Day Saints close early on Mondays so they and their customers are able to spend more time with their families.
type of example of manifestation of representation of