birthday
Let an agent handle birthdays by date, age, customs and privacy, and treat people birth dates as personal data.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent handle birthdays by date, age, customs and privacy, and treat people birth dates as personal data.
The anniversary of the day a person was born, or of the founding of an institution, often marked by celebration; notable birthdays of monarchs and religious figures can be public holidays.
What it is for: Marking a person age and celebrating them; public birthdays mark holidays.
It can be compute age; plan a celebration; send greetings; observe public birthday holidays.
Distinguishing features
Annual anniversary of birth
Customs vary by culture
Leap day birthdays need a rule
Birth dates are personal data
What it looks like
Celebrations with cakes, candles, cards, gifts and gatherings, varying by culture.
How it is recognised
Date of birth recurring each year
Milestone ages
Public birthday holidays of monarchs or religious figures
Related models
is a kind of - category
marks - event
is related to - quantity
is protected as - privacy
In practice
Families and kinds
personal birthdays
milestone birthdays
official birthdays of monarchs
religious birthdays such as saints days
name days (related)
Standards and regulation
Data protection law for dates of birth
Public holiday law for official birthdays
Age thresholds in law
Failure modes and hazards
Exposing dates of birth used in identity checks
Leap day and time zone errors
Assuming customs across cultures
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Date When.
Dates drive age.
Birthday
Date.
Date
Date.
- On what date does the birthday fall this year? measurement
- How is a 29 February birthday handled? boundary
Age
Years.
Age
Age.
- How old will the person be? measurement
- Under which age-counting system? definition
Customs Celebration.
Customs vary.
Traditions
Culture.
Traditions
Customs.
- What customs apply in this culture? definition
- Are birthdays celebrated at all? boundary
Planning
Party.
Planning
Planning.
- How can a celebration be planned? action
- What dietary or accessibility needs apply? boundary
Public birthdays Holidays.
Some birthdays are public.
Holiday
Official observance.
Holiday
Public holiday.
- Is this birthday a public holiday, and where? provenance
- On which date is it observed? measurement
Ceremony
Events.
Ceremony
Ceremonies.
- What official events mark it? provenance
- Where can the schedule be found? provenance
Privacy Personal data.
Birth dates are sensitive.
Data
Storage.
Data
Data handling.
- Is the date of birth needed, or only the day and month? boundary
- Is it stored lawfully? boundary
Exposure
Identity risk.
Exposure
Identity risk.
- Could publishing it help identity fraud? boundary
- Who consented? boundary
What the second pass must settle
- Should official birthdays be separate entries?
- How should name days be linked?
- How should birth dates be protected in data?