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The Gregorian calendar, like the Julian calendar, is a solar calendar with 12 months of 28–31 days each. The year in both calendars consists of 365 days, with a leap day being added to February in the leap years. The months and length of months in the Gregorian calendar are the same as for the Julian calendar.
A full calendar system has a different calendar date for every day. [20] [21] Thus the week cycle is by itself not a full calendar system; [22] neither is a system to name the days within a year without a system for identifying the years. The simplest calendar system just counts time periods from a reference date. [23]
In 2013, archaeologists unearthed ancient evidence of a 10,000-year-old calendar system in Warren Field, Aberdeenshire. [2] This calendar is the next earliest, or "the first Scottish calendar". The Sumerian calendar was the next earliest, followed by the Egyptian, Assyrian and Elamite calendars. The Vikram Samvat has been used by Hindus and Sikhs.
This device contributed to electric technologies that would subsequently be used in music technology) 1877 : The microphone was first invented by David Edward Hughes, despite Thomas Edison being granted the patent. Hughes discovered that electrical currents varied when sound vibrations were passed through carbon packed into a confined space.
In the late 19th century, Thaddeus Cahill introduced the Telharmonium, which is commonly considered the first electromechanical musical instrument. [2] In the early 20th century, Leon Theremin created the Theremin, an early electronic instrument played without physical contact, creating a new form of sound creation.
A music video is a video that integrates a song or an album with imagery that is produced for promotional or musical artistic purposes. Modern music videos are primarily made and used as a music marketing device intended to promote the sale of music recordings.
The International Fixed Calendar is a more modern descendant of this calendar: invented by Moses B. Cotsworth and financially backed by George Eastman. [8] Around 1930, one James Colligan invented the Pax Calendar, which avoids off-calendar days by adding a 7-day leap week to the 364-day common year for 71 out of 400 years.
Alwin Nikolais (November 25, 1910 – May 8, 1993) was an American choreographer, dancer, composer, musician, and teacher. [1] He had created the Nikolais Dance Theatre, [2] and was known for his self-designed innovative costume, lighting and production design.