Day

A day is a unit of time. In common usage, it is an interval equal to 24 hours. It also can mean the consecutive period of time during which the Sun is above the horizon, also known as daytime. The period of time during which the Earth completes one rotation with respect to the Sun is called a solar day.

Several definitions of this universal human concept are used according to context, need and convenience. In 1967, the second was redefined in terms of the wavelength of light, and was designated the SI base unit of time. The unit of measurement "day", redefined in 1967 as 86 400 SI seconds and symbolized d, is not an SI unit, but is accepted for use with SI. A civil day is usually also 86 400 seconds, plus or minus a possible leap second in Coordinated Universal Time (UTC), and, in some locations, occasionally plus or minus an hour when changing from or to daylight saving time. The word day may also refer to a day of the week or to a calendar date, as in answer to the question "On which day?" The life patterns of humans and many other species are related to Earth's solar day and the day-night cycle (see circadian rhythms).

Barbara

Barbara may refer to:

People

Places

Drama, film, and literature

Film

Print

Santa Barbara

Santa Bárbara or Santa Barbara, (meaning Saint Barbara in several Romance languages), was an early Christian saint and martyr.

Santa Bárbara or Santa Barbara may also refer to:

Places and jurisdictions

Americas

Saint Barbara

Saint Barbara (Greek: Αγία Βαρβάρα), Feast Day December 4, known in the Eastern Orthodox Church as the Great Martyr Barbara, was an early Christian saint and martyr. Accounts place her in the 3rd century in Nicomedia, present-day Turkey or in Heliopolis of Phoenicia, present-day Baalbek, Lebanon. There is no reference to her in the authentic early Christian writings nor in the original recension of Saint Jerome's martyrology. Her name can be traced to the 7th century, and veneration of her was common, especially in the East, from the 9th century.

Because of doubts about the historicity of her legend, she was removed from the General Roman Calendar in the 1969 revision, though not from the Catholic Church's list of saints.

Saint Barbara is often portrayed with miniature chains and a tower. As one of the Fourteen Holy Helpers, Barbara continues to be a popular saint in modern times, perhaps best known as the patron saint of armourers, artillerymen, military engineers, miners and others who work with explosives because of her old legend's association with lightning, and also of mathematicians. Many of the thirteen miracles in a 15th-century French version of her story turn on the security she offered that her devotees would not die without making confession and receiving extreme unction.

San Francisco

San Francisco (/sæn frənˈsɪskoʊ/), officially the City and County of San Francisco, is the cultural, commercial, and financial center of Northern California and the only consolidated city-county in California. San Francisco encompasses a land area of about 46.9 square miles (121 km²) on the northern end of the San Francisco Peninsula, which makes it the smallest county in the state. It has a density of about 18,187 people per square mile (7,022 people per km²), making it the most densely settled large city (population greater than 200,000) in the state of California and the second-most densely populated major city in the United States after New York City. San Francisco is the fourth-most populous city in California, after Los Angeles, San Diego and San Jose, and the 13th-most populous city in the United States—with a Census-estimated 2014 population of 852,469. The city and its surrounding areas are known as the San Francisco Bay Area, and are a part of the larger OMB designated San Jose-San Francisco-Oakland combined statistical area, the fifth most populous in the nation with an estimated population of 8.6 million.