November 21

Calendar position and origin

The month name "November" comes from the Latin novem, meaning "nine", a relic of the Roman calendar when November was the ninth month. In today’s Gregorian calendar the numbering is shifted but the historic names remain. As noted, November 21’s ordinal depends on whether the year is a leap year; more on leap years can be found here. The date exists within the Gregorian dating system described more broadly here.

Seasonal and cultural context

In the Northern Hemisphere, November 21 occurs in late autumn: daylight hours are shortening and many temperate-climate locations are moving toward winter conditions. In the Southern Hemisphere the date falls in late spring, with warming temperatures and lengthening days. Astrologically, the Sun is typically in Scorpio at this time, approaching the transition to Sagittarius for those who follow sun-sign astrology.

Observances and significance

• World Television Day — proclaimed by the United Nations to recognize the impact of television on decision-making by bringing attention to events and issues.
• World Hello Day — an informal day that promotes communication and personal diplomacy by encouraging people to greet others as a simple act supporting peace.
• Many countries and communities mark local anniversaries, religious feast days, and civic events on November 21; the specific observances vary widely by region.

Because the date is late in November, it occasionally appears close to movable holidays such as those determined by particular weekdays (for example, the United States Thanksgiving holiday occurs on the fourth Thursday in November and sometimes falls near November 21). Historically, a wide range of political decisions, cultural milestones, and personal anniversaries have occurred on this day in different years.

For more detailed lists of events, births and deaths associated with November 21 in particular years, consult dedicated chronological resources or yearly almanacs. This entry provides a concise overview of the date’s place in the calendar, its seasonal meaning, and several widely observed commemorations.