New Year's Day

In the Gregorian calendar, New Year's Day is the first day of the calendar year, 1 January. Most solar calendars, such as the Gregorian and Julian calendars, begin the year regularly at or near the northern winter solstice. In contrast, cultures and religions that observe a lunisolar or lunar calendar celebrate their Lunar New Year at varying points relative to the solar year.

In pre-Christian Rome, under the Julian calendar, the day was dedicated to Janus, god of gateways and beginnings, for whom January is also named. From Roman times until the mid-18th century, the new year was celebrated at various stages and in various parts of Christian Europe on 25 December, on 1 March, on 25 March and on the movable feast of Easter.

In the present day, with most countries now using the Gregorian calendar as their civil calendar, 1 January according to Gregorian calendar is among the most celebrated of public holidays in the world, often observed with fireworks at the stroke of midnight following New Year's Eve as the new year starts in each time zone. Other global New Year's Day traditions include making New Year's resolutions and calling one's friends and family.