Birthdays

thumb|upright=1.33 |A Rwandan family celebrating a birthday at home in 2021, during the COVID-19 pandemic in Rwanda|COVID-19 pandemic A birthday is the anniversary of the birth of a person or the figurative birth 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.

The zodiac is a belt-shaped region of the sky that extends approximately 8° north and south celestial latitude of the ecliptic – the apparent path of the Sun across the celestial sphere over the course of the year. Within this zodiac belt appear the Moon and the brightest planets, along their orbital planes. The zodiac is divided along the ecliptic into 12 equal parts, called "signs", each occupying 30° of celestial longitude. These signs roughly correspond to the astronomical constellations with the following modern names: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius

Vesak (; Sanskrit: '), also known as Buddha Jayanti, Buddha Purnima, Visak Bochea and Buddha Day''', is a holiday traditionally observed by Buddhists in South Asia and Southeast Asia, as well as in Tibet and Mongolia. It is among the most important Buddhist festivals. The festival commemorates the birth, enlightenment (Pali: Nibbāna, Sanskrit: Nirvāṇa), and death (Parinirvāna) of Gautama Buddha in Theravada, Tibetan Buddhism, and Navayana.

mathematical problem

thumb|right|Humpty Dumpty wearing the cravat he received as an unbirthday present from the White King and Queen. From Through the Looking-Glass, illustration by [[John Tenniel.]] An unbirthday (originally written un-birthday) is an event celebrated on all days of the year which are not a person's birthday. It is a neologism which first appeared in Lewis Carroll's 1871 novel Through the Looking-Glass. The concept gave rise to "The Unbirthday Song" in the 1951 animated feature film Alice in Wonderland.

public holiday in West Bengal, India commemorating the birth of Swami Vivekananda

phenomenon where one is more likely to die on or close to one’s birthday

subconscious tendency of people to prefer the numbers in the date of their birthday