Related Research Articles
Arbor Day is a secular day of observance in which individuals and groups are encouraged to plant trees. Today, many countries observe such a holiday. Though usually observed in the spring, the date varies, depending on climate and suitable planting season.
A calendar date is a reference to a particular day represented within a calendar system. The calendar date allows the specific day to be identified. The number of days between two dates may be calculated. For example, "25 February 2024" is ten days after "15 February 2024". The date of a particular event depends on the observed time zone. For example, the air attack on Pearl Harbor that began at 7:48 a.m. Hawaiian time on 7 December 1941 took place at 3:18 a.m. Japan Standard Time, 8 December in Japan.
A day is the time period of a full rotation of the Earth with respect to the Sun. On average, this is 24 hours. As a day passes at a given location it experiences morning, noon, afternoon, evening, and night. This daily cycle drives circadian rhythms in many organisms, which are vital to many life processes.
Easter, also called Pascha or Resurrection Sunday, is a Christian festival and cultural holiday commemorating the resurrection of Jesus from the dead, described in the New Testament as having occurred on the third day of his burial following his crucifixion by the Romans at Calvary c. 30 AD. It is the culmination of the Passion of Jesus Christ, preceded by Lent, a 40-day period of fasting, prayer, and penance.
The full moon is the lunar phase when the Moon appears fully illuminated from Earth's perspective. This occurs when Earth is located between the Sun and the Moon. This means that the lunar hemisphere facing Earth—the near side—is completely sunlit and appears as an approximately circular disk. The full moon occurs roughly once a month.
May Day is a European festival of ancient origins marking the beginning of summer, usually celebrated on 1 May, around halfway between the spring equinox and summer solstice. Festivities may also be held the night before, known as May Eve. Traditions often include gathering wildflowers and green branches, weaving floral garlands, crowning a May Queen, and setting up a Maypole, May Tree or May Bush, around which people dance. Bonfires are also part of the festival in some regions. Regional varieties and related traditions include Walpurgis Night in central and northern Europe, the Gaelic festival Beltane, the Welsh festival Calan Mai, and May devotions to the Blessed Virgin Mary. It has also been associated with the ancient Roman festival Floralia.
The New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one. Many cultures celebrate the event in some manner. In the Gregorian calendar, the most widely used calendar system today, New Year occurs on January 1. This was also the first day of the year in the original Julian calendar and the Roman calendar.
Pi Day is an annual celebration of the mathematical constant π (pi). Pi Day is observed on March 14 since 3, 1, and 4 are the first three significant figures of π. It was founded in 1988 by Larry Shaw, an employee of the San Francisco science museum, the Exploratorium. Celebrations often involve eating pie or holding pi recitation competitions. In 2009, the United States House of Representatives supported the designation of Pi Day. UNESCO's 40th General Conference designated Pi Day as the International Day of Mathematics in November 2019.
The Coptic calendar, also called the Alexandrian calendar, is a liturgical calendar used by the Coptic Orthodox Church and also used by the farming populace in Egypt. It was used for fiscal purposes in Egypt until the adoption of the Gregorian calendar on 11 September 1875. This calendar is based on the ancient Egyptian calendar. To avoid the calendar creep of the latter, a reform of the ancient Egyptian calendar was introduced at the time of Ptolemy III which consisted of adding an extra day every fourth year. However, this reform was opposed by the Egyptian priests, and the reform was not adopted until 25 BC, when the Roman Emperor Augustus imposed the Decree upon Egypt as its official calendar. To distinguish it from the Ancient Egyptian calendar, which remained in use by some astronomers until medieval times, this reformed calendar is known as the Coptic or Alexandrian calendar. Its years and months coincide with those of the Ethiopian calendar but have different numbers and names.
Eid al-Fitr is the earlier of the two official holidays celebrated within Islam. Eid al-Fitr is celebrated by Muslims worldwide because it marks the end of the month-long dawn-to-sunset fasting of Ramadan. Eid al-Fitr falls on the first day of Shawwal in the Islamic calendar; this does not always fall on the same Gregorian day, as the start of any lunar Hijri month varies based on when the new moon is sighted by local religious authorities. The holiday is known under various other names in different languages and countries around the world. The day is also called Lesser Eid, or simply Eid.
The Baháʼí calendar used in the Baháʼí Faith is a solar calendar consisting of nineteen months and four or five intercalary days, with new year at the moment of Northern spring equinox. Each month is named after a virtue, as are the days of the week. The first year is dated from 1844 CE, the year in which the Báb began teaching.
Eid al-Adha or the Feast of Sacrifice is the second of the two main holidays celebrated in Islam. In Islamic custom, it honours the willingness of Abraham to sacrifice his son, Ishmael, as an act of obedience to God's command. However, before Abraham could sacrifice his son in the name of God, and because of his willingness to do so, God provided him with a lamb to sacrifice in his son's place. In commemoration of this intervention, animals such as lambs, etc. are sacrificed. The meat of the sacrificed animal is divided into three portions: one part of the meat is consumed by the family that offers the animal, one portion is for friends and relatives, while the rest of the meat is distributed to the poor and the needy. Sweets and gifts are given, and extended family members typically visit and are welcomed. The day is also sometimes called the Greater Eid.
Holi is a popular and significant Hindu festival celebrated as the Festival of Colours, Love, and Spring. It celebrates the eternal and divine love of the deities Radha and Krishna. Additionally, the day signifies the triumph of good over evil, as it commemorates the victory of Vishnu as Narasimha over Hiranyakashipu. Holi originated and is predominantly celebrated in the Indian subcontinent, but has also spread to other regions of Asia and parts of the Western world through the Indian diaspora.
In the United Kingdom, public holidays are days on which most businesses and non-essential services are closed. Many retail businesses do open on some of the public holidays. There are restrictions on trading on Sundays, Easter Day and Christmas Day in England and Wales and on New Year's Day and Christmas Day in Scotland. Public holidays defined by statute are called bank holidays, but this term can also be used to include common law holidays, which are held by convention. The term "public holidays" can refer exclusively to common law holidays.
An academic year is "the period of the year during which students attend school or university". An academic year or school year is a period of time which schools, colleges and universities use to measure a quantity of study. In this period, students attend the classes and do relevant exams and homeworks. It comprises school days and school holidays. Duration of school days, school year, and holidays vary across the world.
A sequential time is one in which the numbers form a normal sequence, such as 1:02:03 4/5/06. Short sequential times such as 1:23:45 or 12:34:56 appear every day. Larger sequential times rarely appear, such as 12:34:56 7/8/90, or 01:23:45 on 6/7/89. These times can be dependent on the date format being used; the month/day format will produce different results from the day/month format.
Naw-Rúz is the first day of the Baháʼí calendar year and one of eleven holy days for adherents of the Baháʼí Faith. It occurs on the vernal equinox, on or near March 21, which is also the traditional Persian New Year.
A birthday is the anniversary of the birth of a person, or figuratively of an institution. Birthdays of people are celebrated in numerous cultures, often with birthday gifts, birthday cards, a birthday party, or a rite of passage.
Sfeka d'yoma is a concept and legal principle in Jewish law which explains why some Jewish holidays are celebrated for one day in the Land of Israel but for two days outside the Land. The implications of sfeka d'yoma are discussed in Rosh Hashanah 21a and in the commentaries and poskim.
References
- ↑ Wong, Nicole C. (2004-02-02). "A day getting to the root". The Mercury News. Archived from the original on 2004-08-18. Retrieved 2007-02-20.
- ↑ Hill, Angela (2009-03-02). "Have a rootin' tootin' Square Root Day". Oakland Tribune. Retrieved 2009-03-02.
- ↑ "Math Fans to Celebrate Square Root Day". Yahoo News. 2009-03-02. Archived from the original on March 6, 2009. Retrieved 2009-03-02.
- ↑ Musil, Steven (2009-03-02). "Square Root Day revelers to party like it's 3/3/09". cnet news. Retrieved 2009-03-02.