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).

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

In celebration of Armenian Army formation on that day in 1992

International Women's Day (IWD) is marked on March 8 every year. It is a major day of global celebration for the economic, political and social achievements of women. Started as a political event, the holiday blended in the culture of many countries (primarily Russia and the countries of former Soviet bloc). In some celebrations, the day lost its political flavour, and became simply an occasion for men to express their love to the women around them in a way somewhat similar to Mother's Day and St Valentine's Day mixed together. In others, however, the political and human rights theme as designated by the United Nations runs strong, and political and social awareness of the struggles of women worldwide are brought out and examined in a hopeful manner.

The Armenian Genocide (Armenian: Հայոց Ցեղասպանություն, translit.: Hayoc’ C’eġaspanowt’yown; Turkish: Ermeni Soykırımı), also known as the Armenian Holocaust, the Armenian Massacres and, by Armenians, as the Great Calamity (Մեծ Եղեռն, Meç Eġeṙn, Armenian pronunciation: [mɛts jɛˈʁɛrn]), was the deliberate and systematic destruction (genocide) of the Armenian population of the Ottoman Empire during and just after World War I. It was characterised by the use of massacres, and the use of deportations involving forced marches under conditions designed to lead to the death of the deportees, with the total number of Armenian deaths generally held to have been between one and one-and-a-half million. Other ethnic groups were similarly attacked by the Empire during this period, including Assyrians and Greeks, and some scholars consider those events to be part of the same policy of extermination.

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.

Although the Russian army succeeded in gaining most of Ottoman Armenia during World War I, their gains were lost with the Bolshevik Revolution of 1917. At the time, Russian-controlled Eastern Armenia, Georgia, and Azerbaijan attempted to bond together in the Transcaucasian Democratic Federative Republic. This federation, however, only lasted from February to May 1918, when all three parties decided to dissolve it. As a result, Eastern Armenia became independent as the Democratic Republic of Armenia (DRA) on May 28.

Adopted by referendum on July 5, 1995.

Independence from the Soviet Union in 1991.

The Spitak Earthquake (also called Leninakan Earthquake and Gyumri Earthquake) was a tremor with a magnitude of 6.9, that took place on December 7, 1988 at 11:41 local time (07:41 UTC) in the Spitak region of Armenia, then part of the Soviet Union. The earthquake killed at least 25,000 people; geologists and earthquake engineering experts laid the blame on the poorly built support structures of apartments and other buildings built during the "stagnation" era of Leonid Brezhnev.