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Evergreen date guide

What is celebrated on December 9?

See the observances and verified observance-history milestones attached to December 9. Each observance keeps its own source and date details.

Verified history

On this date in observance history

Today in history →

Selected observance milestones connected to this date, based on reviewed sources.

2022
First observance

National Opal Apples Day

A FirstFruits Farms release dated December 8, 2022 explicitly describes December 9, 2022 as the inaugural National Opal Apples Day.

2021
Institutional decision

International Moon Day

The official UN action record for UN General Assembly resolution A/RES/76/76 gives the adoption/action date as 9 December 2021.

1965
Later action

Tiradentes Day

Declared Tiradentes the civic patron of the Brazilian nation and provided for annual programming connected with April 21 commemorations.

About this date

What this date contains

6 observances

Each observance is shown once in this view, with its own source and scope details available on the guide page.

0 repeat predictably

0 use a fixed annual date and 0 follow a reusable calendar rule.

0 are edition-specific

These dates are shown only for the year or edition that has been confirmed.

2 have a country-specific scope

Country-specific observances are not presented as worldwide events.

6 have in-depth guides

These pages include reviewed meaning, history, activities, facts and FAQs.

Curated global anchors

Major global guides on December 9

See the collection →

A reviewed starting point drawn from prominent global observances with strong institutional or organizer sources. Each observance keeps its own documented status and scope.

Reviewed depth

Other in-depth guides on December 9

Source-backedFixed AnnualIn-depth guide

International Day of Veterinary Medicine

9 December · Veterinary/pet-awareness calendar usage; international in name, without evidence here of an intergovernmental designation

The Animal Medical Center lists International Day of Veterinary Medicine on December 9 across multiple annual veterinary-awareness calendars, including 2024, 2025 and 2026.

Source-backedFixed AnnualIn-depth guide

National Opal Apples Day

9 December · United States / FirstFruits Farms and Opal Apples branded food observance

A FirstFruits Farms release published on December 8, 2022 identifies December 9, 2022 as the inaugural National Opal Apples Day, and current Opal Apples brand materials continue to maintain…

Source-backedFixed AnnualIn-depth guide

Tanzania Independence Day

9 December annually · Tanzania / Independence and Republic Day public holiday

Tanzanian official history identifies 9 December 1961 as Tanganyika’s independence date, while the current Public Holidays Act lists 9 December as Independence and Republic Day.

Source-backedFixed AnnualIn-depth guide

V.C. Bird Day / National Heroes Day

9 December · Antigua and Barbuda / national holiday calendar

The Government of Antigua and Barbuda lists V.C. Bird Day on 9 December; its Government Information Service also identifies 9 December as V.C. Bird Day/National Heroes Day.

Explore the mix

Topics represented on December 9

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Civic, Remembrance & History 4Health, Wellness & Awareness 1Food, Drink & Hospitality 1
6 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

International Day of Veterinary Medicine

9 December · Veterinary/pet-awareness calendar usage; international in name, without evidence here of an intergovernmental designation

The Animal Medical Center lists International Day of Veterinary Medicine on December 9 across multiple annual veterinary-awareness calendars, including 2024, 2025 and 2026.

Source-backedFixed AnnualIn-depth guide

National Opal Apples Day

9 December · United States / FirstFruits Farms and Opal Apples branded food observance

A FirstFruits Farms release published on December 8, 2022 identifies December 9, 2022 as the inaugural National Opal Apples Day, and current Opal Apples brand materials continue to maintain…

Source-backedFixed AnnualIn-depth guide

Tanzania Independence Day

9 December annually · Tanzania / Independence and Republic Day public holiday

Tanzanian official history identifies 9 December 1961 as Tanganyika’s independence date, while the current Public Holidays Act lists 9 December as Independence and Republic Day.

Source-backedFixed AnnualIn-depth guide

V.C. Bird Day / National Heroes Day

9 December · Antigua and Barbuda / national holiday calendar

The Government of Antigua and Barbuda lists V.C. Bird Day on 9 December; its Government Information Service also identifies 9 December as V.C. Bird Day/National Heroes Day.

How dates are selected

This page combines fixed annual dates, reusable calendar rules and year-specific dates confirmed for 2026. Variable or historical dates are included only when they are clearly supported.

Read the methodology →