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Showing content from https://en.wikipedia.org/wiki/en:Template:Birth_date_and_age below:

Template:Birth date and age - Wikipedia

From Wikipedia, the free encyclopedia

Do NOT use this template when the exact date of birth is disputed or unknown; consider {{Birth year and age}} instead. This template is used on approximately 765,000 pages, or roughly 1% of all pages.
To avoid major disruption and server load, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them.

{{Birth date and age}} returns a living person's date of birth and age. Using this template rather than simply inserting the date into articles allows for the inclusion of hidden metadata about the date. This metadata can be used by web browsers and other software tools to extract the details, and display them using some other website or mapping tool, index, or search them.

This template is intended for use in an article about a living person. For an article about a dead person, use {{Birth date}} with {{Death date and age}}.

Is the displayed age incorrect?

The age displayed was calculated when the page was last purged. If a particular article is showing the wrong age, edit the whole page and publish the edit without making any change and with no edit summary. That will update the age. The page can also be purged by appending &action=purge to the URL.

Usage

Unnamed parameters for year, month, day: {{Birth date and age|year of birth|month of birth|day of birth|additional parameters}}; {{bda|year of birth|month of birth|day of birth|additional parameters}}

Named parameters for year, month, day: {{Birth date and age|year=year of birth|month=month of birth|day=day of birth|additional parameters}}; {{bda|year=year of birth|month=month of birth|day=day of birth|additional parameters}}

Additional parameters

The df (day first) and mf (month first) parameters indicate the intended date format to display. The appropriate parameter should be set to "y" or "yes" e.g. df=yes or mf=y.

The default output of this template is to display the month before the day. This default may not be appropriate for articles about people from parts of the world where the day precedes the month in a date. In such articles the parameter, "df", should be set to display the day before the month.

The parameter "mf", while not actually used by the template, will indicate that month first format is intended. Using these parameters can assist bots or other automated processing to detect which date format is intended; leaving the format as default may lead an editor or bot to change the format to an unintended value.

Do not specify both "df" and "mf" parameters in the same use of the template, as these formats are mutually exclusive.

Error tracking

Some kinds of invalid input are tracked in Category:Pages using age template with invalid date.

Also see Category:Pages using birth date and age with unknown parameters (13).

hCard microformat

This template also returns the date, hidden by CSS, in the ISO 8601 standard.^[1] ^[2] For example:

(<span class="bday">1993-02-24</span>)

Note: For the "foundation", "built" and similar set-up dates of companies, buildings etc., use {{start date}} (this will work for year-only or month-year dates). Because the ISO 8601 standard requires the Gregorian calendar, this template should not be used if the date is given in the Julian calendar.

For further information, visit the microformats project.

Notes

Do not use with non-Gregorian dates because the resulting hCard hidden date will be false.
The template will appear broken when the parameters are left blank.
When only the year of a person's birth is known, or if it is desired not to state a person's full dates of birth for privacy reasons, consider using the templates {{Birth year}} or {{Birth year and age}} instead.

Examples

Unnamed parameters for year, month, day: {{Birth date and age|1993|2|24}} returns " (1993-02-24) February 24, 1993 (age 32)"; {{Birth date and age|1993|2|24|df=yes}} returns " (1993-02-24) 24 February 1993 (age 32)"; {{Birth date and age|1993|2|24|mf=yes}} returns " (1993-02-24) February 24, 1993 (age 32)"

Named parameters for year, month, day: {{Birth date and age|year=1993|month=2|day=24}} returns " (1993-02-24) February 24, 1993 (age 32)"; {{Birth date and age|year=1993|month=2|day=24|df=yes}} returns " (1993-02-24) 24 February 1993 (age 32)"; {{Birth date and age|year=1993|month=2|day=24|mf=yes}} returns " (1993-02-24) February 24, 1993 (age 32)"

Using month name instead of number

The following examples use a parameter value that will not work in the {{Birth date}}, {{Death date}}, or {{Death date and age}} templates.

Unnamed parameters for year, month name, day: {{Birth date and age|1993|Feb|24}} returns " (1993-02-24) February 24, 1993 (age 32)"; {{Birth date and age|1993|Feb|24|df=yes}} returns " (1993-02-24) 24 February 1993 (age 32)"; {{Birth date and age|1993|Feb|24|mf=yes}} returns " (1993-02-24) February 24, 1993 (age 32)"

Named parameters for year, month name, day: {{Birth date and age|year=1993|month=Feb|day=24}} returns " (1993-02-24) February 24, 1993 (age 32)"; {{Birth date and age|year=1993|month=Feb|day=24|df=yes}} returns " (1993-02-24) 24 February 1993 (age 32)"; {{Birth date and age|year=1993|month=Feb|day=24|mf=yes}} returns " (1993-02-24) February 24, 1993 (age 32)"

Using full date in one parameter

The following examples use a parameter value that will not work in the {{Birth date}}, {{Death date}}, or {{Death date and age}} templates.

The date format entered does not change the date format displayed, which is MDY by default or DMY if |df=y (to display the date in the same format it was entered, use {{Birth-date and age}}).

Unnamed parameter for full date (output in MDY format): {{Birth date and age|1993-2-24}} returns " (1993-02-24) February 24, 1993 (age 32)"; {{Birth date and age|Feb 24, 1993}} returns " (1993-02-24) February 24, 1993 (age 32)"; {{Birth date and age|24 Feb 1993}} returns " (1993-02-24) February 24, 1993 (age 32)"

Unnamed parameter for full date (output in DMY format): {{Birth date and age|1993-2-24|df=y}} returns " (1993-02-24) 24 February 1993 (age 32)"; {{Birth date and age|24 Feb 1993|df=y}} returns " (1993-02-24) 24 February 1993 (age 32)"; {{Birth date and age|Feb 24, 1993|df=y}} returns " (1993-02-24) 24 February 1993 (age 32)"

Output compared to {{Birth-date and age}}: {{Birth date and age|24 February 1993}} returns " (1993-02-24) February 24, 1993 (age 32)"; {{Birth-date and age|24 February 1993}} returns "24 February 1993 (1993-02-24) (age 32)"; {{Birth date and age|Feb 24, 1993}} returns " (1993-02-24) February 24, 1993 (age 32)"; {{Birth-date and age|Feb 24, 1993}} returns "Feb 24, 1993 (1993-02-24) (age 32)"; {{Birth date and age|Feb. 24, 1993}} returns "Error: Need valid birth date: year, month, day" ("Feb" without a dot is required to avoid an error); {{Birth-date and age|Feb. 24, 1993}} returns "Feb. 24, 1993 (1993-02-24) (age 32)"

TemplateData

This template will return a living person's date of birth and age. Using this template rather than simply inserting the date into articles allows for the inclusion of hidden metadata about the date. This metadata can be used by web browsers and other software tools to extract the details, and display them using some other website or mapping tool, index, or search them.

Template parameters[Edit template data]

Parameter Description Type Status Year of birth 1 year

The year in which the person was born

Example: 1993

Number required Month of birth 2 month

The month (number) in which the person was born

Example: 2

Number required Day of birth 3 day

The day (number) in which the person was born

Example: 24

Number required Day first df

When set to 'y' or 'yes', the date of birth is output in a DMY format

Suggested values: yes y
Auto value: yes

Line optional Month first mf

When set to 'y' or 'yes', stresses that the default MDY date format is intended for the date of birth

Suggested values: yes y
Auto value: yes

Line optional

References

Tracking categories

See also

{{Birth year and age}} for year of birth, with optional parameter for month
{{Birth-date and age}} which accepts formats like "1 April 1990" or "April 1, 1990"
{{Birth date}} or {{Birth date text}} for a deceased person
{{Recent birth}} or {{Recent death}}
{{Birth based on age as of date}} for approximate year of birth, when exact date of birth is unsourced

Birth, death and age templates

birth, death, age

Combined BDA template Description / use {{BirthDeathAge}} Combines functions of {{Birth date}}, {{Birth date text}}, {{Birth date and age}}, {{Birth year and age}}, {{Death date}}, {{Death date text}}, {{Death date and age}}, and {{Death year and age}}. Birth templates Description / use {{Birth date}} To display a birth date and related hidden metadata. {{Birth date text}} {{Birth date and age}} {{Birth date}} with suffix '(age N)'. {{Birth date and age2}} {{Birth date and age}} plus age as of a specified date. {{Birth-date and age}} As {{Birth date and age}}, but accepts dates in text form ('15 June 1950', 'June 15, 1950', 'June 1950', etc.). {{Birth date and age in years and days}} {{Birth date and age}}, but with the age displayed in years and days rather than just years. {{Birth year and age}} Year of birth and approximate age. {{Birth based on age as of date}} To display approximate birth year and current age given a particular date (e.g. when a dated reference mentions the age of a person), only works for living people. {{Birth based on age as of dates}} To display approximate birth year and current age given several particular dates (e.g. when a dated reference mentions the age of a person), only works for living people. {{Birth based on age at death}} To display approximate birth year based on age at death, or on age at a specific date if death date isn't known. Death templates Description / use {{Death date}} To display a death date and related hidden metadata. {{Death date text}} {{Death date and age}} {{Death date}} with suffix '(aged N)'; also called with {{event date and age}}. {{Death-date and age}} As {{Death date and age}}, but accepts dates in text form ('15 June 1950', 'June 15, 1950', 'June 1950', etc.). {{Death date and given age}} To display a death date and specified age. {{Death year and age}} To display a year of, and approximate age at death.

age only

Conventional age templates Description / use {{Age in years, months, weeks and days}} Number of complete years, months, weeks and days between two dates. {{Age in years, months and days}} Number of complete years, months and days between two dates. {{Age in years and months}} Number of complete years and remaining months between two dates. {{Age in years and days}} Number of complete years and remaining days between two dates. {{Age in years and days nts}} {{Age in years and days}} with output formatted for use in number sortable tables. {{Age in decimal years}} Number of years between two dates, rounded to the specified number of decimal places. {{Age in years}} Number of years between two dates. {{Age in years nts}} {{Age in years}} with output formatted for use in number sortable tables. {{Age in months}} Number of months between two dates. {{Age in weeks and days}} Number of weeks and days between two dates. {{Age in weeks}} Number of weeks between two dates. {{Age in days}} Age in days between two dates. {{Age in days nts}} {{Age in days}} with output formatted for use in number sortable tables. Reverse-determined age template Description / use {{Age}} Age based on number of complete years between two dates. {{Age nts}} {{Age}} with output formatted for use in number sortable tables. {{Age as of date}} Current age (in years) from a known age at a specified date. {{Age for infant}} Current age for infant: months and days up to one year, years and months up to three years, and years beyond age 3.

start / end dates

Date-focused templates Description / use {{Start date}} / {{End date}} {{Start date text}} / {{End date text}} {{Start date and age}} {{End date and age}}

miscellaneous

Template Description / use {{OldStyleDate}} Dates in Julian calendar. {{OldStyleDateDY}} As {{OldStyleDate}} but used when Julian / Gregorian dates fall in different years. {{OldStyleDateNY}} As {{OldStyleDate}} but without the year. {{Unidentified for}} {{Missing for}}

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