In countries which use the Gregorian calendar, New Year's Day is usually celebrated on 1 January. The order of months in the Roman calendar has been January to December since King Numa Pompilius in about 700 BC, according to Plutarch and Macrobius. However, Roman writers identified years by naming the year's consuls, who did not enter office on 1 January until 153 BC. Since then 1 January has been the first day of the year, except during the Middle Ages when several other days were the first (1 March, 25 March, Easter, 1 September, 25 December). With the expansion of Western culture to the rest of the world during the twentieth century, the 1 January date became global, even in countries with their own New Year celebrations on other days (e.g., China and India). At present, the celebration of the New Year is a major event worldwide. Many large-scale events are held in major cities around the world, with many large fireworks events on New Year's Eve (31 December). Sydney launched over 80,000 fireworks at midnight, and had more than one and a half million attendees; it was also the most-watched event on television worldwide last year. In Valparaiso upwards of two million visitors witnessed the largest fireworks display in a natural setting; a total of more than 21 kilometers of fireworks on the bay, from the commercial port city of Valparaiso to Concon, Chile, all in 25 minutes of entertainment. London's New Year celebrations centre around the London Eye, with an impressive fireworks display while Big Ben strikes midnight. In New York, the celebration is focused around a large crystal ball that descends in a one minute countdown in Times Square. Edinburgh plays host to one of the world's largest Hogmanay events. The celebrations last for four days and attract visitors from around the globe to take part in street parties and attend concerts. In the culture of Latin America there are a variety of traditions and superstitions surrounding these dates as omens for the coming year. January remains a symbol of the New Year's celebration. According to the Christian tradition, 1 January coincides with the circumcision of Christ (eight days after birth), when the name of Jesus was given to him (Luke 2: 21).

Good Friday, also called Holy Friday, Black Friday, or Great Friday, is a holiday observed primarily by adherents to Christianity commemorating the crucifixion of Jesus and his death at Calvary. The holiday is observed during Holy Week as part of the Paschal Triduum on the Friday preceding Easter Sunday, and often coincides with the Jewish observance of Passover. Based on the scriptural details of the Sanhedrin Trial of Jesus, the Crucifixion of Jesus was most probably on a Friday. The estimated year of Good Friday is AD 33, by two different groups, and originally as AD 34 by Isaac Newton via the differences between the Biblical and Julian calendars and the crescent of the moon. A third method, using a completely different astronomical approach based on a lunar Crucifixion darkness and eclipse model (consistent with Apostle Peter's reference to a "moon of blood" in Acts 2:20) arrives at the same date, namely Friday April 3, AD 33.

Eid ul-Fitr (Arabic: عيد الفطر ‘Īdu l-Fiṭr‎), often abbreviated to Eid, is a Muslim holiday that marks the end of Ramadan, the Islamic holy month of fasting. Eid is an Arabic word meaning "festivity", while Fiṭr means "to break fast"; and so the holiday symbolizes the breaking of the fasting period. It is celebrated after the end of the Islamic month of Ramadan, on the first day of Shawwal. Eid ul-Fitr lasts for three days of celebration and is sometimes also known as the "Smaller Eid" (Arabic: العيد الصغير al-‘īdu ṣ-ṣaghīr‎) as compared to the Eid ul-Adha that lasts four days and is called the "Greater Eid" (Arabic: العيد الكبير al-‘īdu l-kabīr‎). Muslims are commanded by the Quran to complete their fast on the last day of Ramadan and then recite the Takbir all throughout the period of Eid.

International Workers' Day (a name used interchangeably with may day) is a celebration of the social and economic achievements of the international labor movement. May Day commonly sees organized street demonstrations and street marches by millions of working people and their labour unions throughout most of the countries of the world.

Corpus Christi (Latin for Body of Christ) is a Western Catholic feast. It is also celebrated in some Anglican and Lutheran churches. It honors the Eucharist, which believers consider to be the actual body and blood of Christ, and as such it does not commemorate a particular event in Jesus' life. It is held on the Thursday after Trinity Sunday or, in some places, on the following Sunday. Its celebration on a Thursday is meant to associate it with Jesus' institution of the Eucharist during the Last Supper, commemorated on Maundy Thursday, and this is the first free Thursday after Paschaltide. In the Ordinary Form of the Catholic Church, the feast is officially known as the Solemnity of the Most Holy Body and Blood of Christ. In many English-speaking countries, Corpus Christi is transferred to the Sunday after Trinity Sunday by both Catholics and Anglicans. At the end of the Mass, it is customary to have a Procession of the Blessed Sacrament (often outdoors), followed by Benediction of the Blessed Sacrament.

Eid al-Adha (Arabic: عيد الأضحى‎ ‘Īdu l-’Aḍḥā) "Festival of Sacrifice" or "Greater Eid" is an important religious holiday celebrated by Muslims worldwide to commemorate the willingness of Abraham (Ibrahim) to sacrifice his son as an act of obedience to God, but instead was able to sacrifice a ram (by God's command). Eid is also about spending time with family and friends, sacrifice, and thanksgiving for being able to afford food and housing. In traditional or agrarian settings, each family would sacrifice a domestic animal, such as a sheep, goat, cow, or camel, by slaughter (though many contemporary muslims do not sacrifice an animal as part of their observance). The meat would then be divided into three equal parts to be distributed to others. The family eats one third, another third is given to other relatives, friends or neighbors, and the other third is given to the poor as a gift. Eid al-Adha is the latter of two Eid festivals celebrated by Muslims, whose basis comes from the Quran. Like Eid ul-Fitr, Eid al-Adha begins with a short prayer followed by a sermon (khuṭba). Eid al-Adha is celebrated annually on the 10th day of the month of Dhul Hijja (ذو الحجة) of the lunar Islamic calendar. The festivities last for three days or more depending on the country. Eid al-Adha celebrations start after the Hajj, the annual pilgrimage to Mecca in Saudi Arabia by Muslims worldwide, descend from Mount Arafat. The date is approximately 70 days after the end of the month of Ramadan.

All Saints' Day (in the Catholic Church officially the Solemnity of All Saints and also called All Hallows or Hallowmas), often shortened to All Saints, is a solemnity celebrated on 1 November in Western Christianity, and on the first Sunday after Pentecost in Eastern Christianity, in honour of all the saints, known and unknown. In terms of Western Christian theology, the day commemorates all those who have attained the beatific vision in Heaven. In the Roman Catholic Church, the next day, All Souls' Day, specifically commemorates the departed faithful who have not yet been purified and reached heaven. It is a national holiday in many historically Catholic countries.

The Santa Cruz massacre (also known as the Dili massacre) was the shooting of East Timorese pro-independence demonstrators in the Santa Cruz cemetery in the capital, Dili, on 12 November 1991, during the Indonesian occupation of East Timor.

The decolonisation process instigated by the 1974 Portuguese revolution saw Portugal effectively abandon the colony of East Timor. A civil war between supporters of East Timorese political parties, Fretilin and the UDT, broke out in 1975 as UDT attempted a coup which Fretilin resisted with the help of local Portuguese military. Independence was unilaterally declared on 28 November 1975.

Anniversary of Indonesian invasion of East Timor, 1975.

The Immaculate Conception is, according to Roman Catholic doctrine, the conception of the Virgin Mary without any stain ("immacula" in Latin) of original sin. It is one of the four dogmas in Roman Catholic Mariology. Under this aspect Mary is sometimes called the Immaculata (the Immaculate One), particularly in artistic contexts. The dogma states that, from the first moment of her existence, Mary was preserved by God from the lack of sanctifying grace that afflicts mankind and that she was instead filled with divine grace. It is further said by Catholics that she lived a life completely free from sin. Belief in Mary's immaculate conception in the womb of her mother, through sexual intercourse, should not be confused with the doctrines of the virginal conception of her son Jesus, known as the Annunciation and the Virgin Birth. The feast of the Immaculate Conception, celebrated on 8 December, was established as a universal feast in 1476 by Pope Sixtus IV. He did not define the doctrine as a dogma, thus leaving Roman Catholics free to believe in it or not without being accused of heresy; this freedom was reiterated by the Council of Trent. The existence of the feast was a strong indication of the Church's belief in the Immaculate Conception, even before its 19th century definition as a dogma. The Immaculate Conception was solemnly defined as a dogma by Pope Pius IX in his constitution Ineffabilis Deus on 8 December 1854. The Catholic Church teaches that the dogma is supported by Scripture (e.g., Mary's being greeted by the Angel Gabriel as "full of grace") as well as either directly or indirectly by the writings of Church Fathers such as Irenaeus of Lyons and Ambrose of Milan. Catholic theology maintains that since Jesus became incarnate of the Virgin Mary, it was fitting that she be completely free of sin for expressing her fiat. In 1904 Pope Saint Pius X also addressed the issue in his Marian encyclical Ad Diem Illum on the Immaculate Conception. In the Catholic Church the Solemnity of the Immaculate Conception is a Holy Day of Obligation, except where conferences of bishops have decided, with the approval of the Holy See, not to maintain it as such. It is a public holiday in some countries where Roman Catholicism is predominant.

Christmas or Christmas Day is an annual Christian holiday commemorating the birth of Jesus Christ. It is celebrated on December 25, but this date is not known to be Jesus' actual birthday, and may have initially been chosen to correspond with either the day exactly nine months after some early Christians believed Jesus had been conceived, a historical Roman festival, or the date of the northern hemisphere's winter solstice. Christmas is central to the Christmas and holiday season, and in Christianity marks the beginning of the larger season of Christmastide, which lasts twelve days