Sunday is the day of the week between Saturday and Monday. In the Judaeo-Christian tradition it is the first day of the week, but from mid-20th century it is often counted as the seventh day of the week. Sunday is named after Sunne (Sól), Germanic goddess of the sun, from which the word sun is also derived, although ultimately all English days names are derived from Roman or Greek mythology, in this case dies solis, respectively hêméra Hêliou. The practice of naming the seven days after the then known "planets" goes back to Babylonian or Egyptian times and was adopted by Greeks and Romans.
Sunday is considered a holiday in many countries of the world and as part of the weekend. Predominantly countries influenced by Islamic (or Jewish) culture often have Friday (or Saturday) as a weekly holiday instead.
The Gregorian calendar repeats every 400 years, and no century starts on a Sunday. The Jewish New Year never falls on a Sunday. Any month beginning on a Sunday will contain a Friday the 13th.
In the folk rhyme Monday's Child, "... the child that is born on the Sabbath Day is bonny and blithe and good and gay."
In Thailand, the color associated with Sunday is red.
