Youth is the time of life between childhood and adulthood (maturity). Definitions of the specific age range that constitutes youth vary. An individual's actual maturity may not correspond to their chronological age, as immature individuals could exist at all ages.

Around the world, the terms "youth", "adolescent", "teenager", "kid", and "young person" are interchanged, often meaning the same thing, occasionally differentiated. Youth generally refers to a time of life that is neither childhood nor adulthood, but rather somewhere in-between. Youth also identifies a particular mindset of attitude, as in "He is very youthful". The term youth is also related to being young.

Youth is an alternative word to the scientifically-oriented adolescent and the common terms of teen and teenager. Another common title for youth is young person or young people.

August 12th was declared International Youth Day by The United Nations.

The age in which a person is considered a "youth", and thus eligible for special treatment under the law and throughout society varies around the world.

A day is a unit of time, commonly defined as an interval equal to 24 hours. It also can mean that portion of the full day during which a location is illuminated by the light of the sun, also known as daytime. The period of time measured from local noon to the following local noon 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 it became the SI base unit of time. The unit of measurement for time called "day", redefined in 1967 as 86,400 SI seconds and symbolized d, is not an SI unit, but it 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?" Day also refers to the part of the day that is not night — also known as 'daytime'. The life patterns of humans and many other species are related to Earth's solar day and the cycle of day and night (see circadian rhythms).

Matthew "Matt" Guion Maher (born November 10, 1974) is a contemporary Christian music (CCM) artist, songwriter, and worship leader originally from Newfoundland, Canada, who later relocated to Tempe, Arizona. He has written and produced five solo albums to date. Three of his albums have reached the Top 25 Christian Albums Billboard chart and four of his singles have reached the Top 25 Christian Songs chart. He is a practising Catholic.

Maher was born and raised in Newfoundland, Canada. His parents recognized his musical talent, and he grew up taking piano lessons and immersing himself in a broad variety of music and playing in concert and jazz ensembles, singing in a choir, and playing in a garage rock band.

Maher received a scholarship from the Jazz Department at Arizona State University, where he studied Jazz Piano and got his music degree. He paid for his first three years of college by playing piano in a hotel.

Matt currently lives in Tempe, Arizona. He is involved in building community at Our Lady of Mount Carmel parish. He married Kristin Fisher on September 10, 2010. Their son, Michael Conor, was born on August 1, 2011.