In the United States, Tax Day is a colloquial term for the day on which individual income tax returns are due to the federal government. The term may also refer to the same day for states, even where the tax return due date is a different day.

Since 1955, for those living in the United States, Tax Day has typically fallen on April 15. For those filing a U.S. tax return but, living outside the United States and Puerto Rico, Tax Day has typically fallen on June 15, due to the two month automatic extension granted to filers by IRS Publication 54.

When April 15 falls on a Friday, tax returns are due the following Monday, and when April 15 falls on a Saturday or Sunday, tax returns are due the following Tuesday, due to the observance of Emancipation Day in Washington, D.C.

Federal income tax was introduced with the Revenue Act of 1861 to help fund the Civil War, and subsequently repealed, re-adopted, and held unconstitutional. The early taxes were based on assessments, not voluntary tax returns. Tax payment dates varied by act.

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).

Rafael Edward Cruz, known as Ted Cruz (born December 22, 1970), is the former Solicitor General of the U.S. state of Texas, a position which he held from 2003 to May 2008. Cruz was appointed by Texas Attorney General Greg Abbott. He was the first Hispanic Solicitor General in Texas, the youngest Solicitor General in the United States, and had the longest tenure in the post thus far in Texas history. He is currently a partner at the law firm Morgan, Lewis & Bockius, where he leads the firm’s U.S. Supreme Court and national appellate litigation practice.

Cruz is a candidate for the 2012 Republican nomination for the United States Senate seat being vacated by Kay Bailey Hutchison.

Cruz previously served as the director of the Office of Policy Planning at the Federal Trade Commission, an Associate Deputy Attorney General at the United States Department of Justice, and as Domestic Policy Advisor to U.S. President George W. Bush on the 2000 Bush-Cheney campaign. In addition, from 2004-2009 Cruz was an Adjunct Professor of Law at the University of Texas School of Law in Austin, where he taught U.S. Supreme Court litigation.

Bill Hennessy is a former Irish sportsman who played hurling for his local club Tullaroan and the Kilkenny intercounty side. Hennessy won senior All-Ireland medals with "the Cats" in 1992 and 1993, and was team captain for the year 1995 in which Kilkenny won the National Hurling League.

Robert Paul Green (born 18 January 1980) is an English footballer who plays for West Ham United and the England national team as a goalkeeper. He has played over 200 times for both West Ham and his former club, Norwich City and was a member of their 2003-04 First Division winning side. He has represented England at England U16, England U18, England B level and for the full England squad and represented them in the 2010 FIFA World Cup.

Born in Chertsey, Surrey, Green came through the youth system at Norwich City and made his first team debut on 11 April 1999 keeping a clean sheet in the 0–0 local derby draw against Ipswich Town at Carrow Road. However, first-team opportunities were restricted by the presence of first-choice goalkeeper Andy Marshall and it was not until Marshall's departure in the summer of 2001 that Green was able to establish himself as first choice goalkeeper for Norwich.

He was a star of the 2001–02 season play off campaign which culminated in a final loss to Birmingham City on penalties. During the extra time period of this match Green pulled off a top class save from Geoff Horsfield from point blank range. The following season Green was an ever present in a Norwich side that finished in 8th position in the Championship table, missing out on the play offs by two places. Green made an impressive tally of 19 clean sheets during the campaign, beating the previous season's effort of 18.