Template:Birth based on age as of dates
In this article, we will delve into the exciting world of Template:Birth based on age as of dates, exploring its various facets, meanings and impacts on today's society. Template:Birth based on age as of dates is a widely discussed and highly relevant topic today, it arouses debate and interest among both experts and the general public. Through a detailed and exhaustive analysis, we will seek to shed light on the most relevant aspects of Template:Birth based on age as of dates, allowing the reader to acquire a deeper and more comprehensive knowledge of this fascinating topic. Join us on this journey of discovery and reflection, where we will explore together the meaning and importance of Template:Birth based on age as of dates in our lives.
| This template is currently being merged with Template:Birth based on age as of date. This template is being merged with another template, after which it will be redirected or deleted. Please check Wikipedia:Templates for discussion/Holding cell for any additional instructions. The decision to merge this template was made following this discussion initiated on 30 September 2025 at Templates for discussion. Note: Please review this template's instructions at Wikipedia:Templates for discussion/Holding cell before proceeding with any type of merging. |
 | This template uses Lua: |
For a person whose date of birth is unknown, this template estimates the person's birth year and current age based on given ages at multiple certain date. This is useful when several reliable sources state only their age at the time of publication.
 | This template is appropriate in cases where sources from multiple points in time are available. |
If you have reason to believe the subject's age has been discussed by sources at more than one point in time, consider using this template which doesn't introduce as much error as {{Birth based on age as of date}}. For example, if a reliable source on May 1st, 2010 states Mr X is 29 years old and a different source on August 1st, 2020 states Mr X is 40 years old, then you can establish that Mr X was born no earlier than May 2nd, 1980. Using this template would always suggest a birth year of 1980, while a template using only one point in time could only suggest a birth year of either 1979 or 1980. In this case, using this template is more appropriate.
| This template is intended for living people. |
If the subject has died, this template is not recommended for use.
Syntax
Typical use
{{birth based on age as of dates | age | year | month | day | age2 | year2 | month2 | day2 }}
{{birth based on age as of dates|50|2023|1|17|51|2023|12|31}}{{birth based on age as of dates|50|2023|1|17|50|2023|12|31}}The age, year, and day must be supplied as natural numbers; month can be specified as a natural number as well as by name or abbreviation (e.g. "August" or "Aug"). The Gregorian calendar is assumed, with no special support provided for dual dating or the difference between Old Style and New Style dates.
If only the publication year for a source is known, the "day" and "month" fields can be omitted.
No age
In some contexts—like the lead sentence of a biography—it may be desirable to show only the birth year, and not a person’s age. To suppress the age field, set |noage=yes:
{{birth based on age as of dates|50|2023|1|17|51|2023|12|31|noage=1|slash=y}}Separator
In general, the two possible birth years should be written out as: 1950 or 1951. In contexts which are tight for space, the separator between the two possible years should be a slash: 1950/1951.
To use the / separator, add |slash=yes.
{{birth based on age as of dates|50|2023|1|17|51|2023|12|31|slash=yes}}Examples
|
The following examples are for a person reported as being 50 years old in 2024 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
This template calculates the birth year and current age based on the age as of several dates.
| Parameter | Description | Type | Status | |
|---|---|---|---|---|
| Age | 1 | Age of subject at date of reference's publication.
| Number | required |
| Year | 2 | Year of publication of reference.
| Number | required |
| Month | 3 | Month of publication of reference.
| String | required |
| Day | 4 | Day of publication of reference.
| Number | required |
| Age | 5 | Age of subject at date of reference's publication.
| Number | required |
| Year | 6 | Year of publication of reference.
| Number | required |
| Month | 7 | Month of publication of reference.
| String | required |
| Day | 8 | Day of publication of reference.
| Number | required |
| Hide age | noage | Set to a value of 'yes' to display year of birth without the age
| Boolean | optional |
| Slash separator | slash | Set to 'yes' to separate years with a '/' for tight spaces (e.g., table cells)
| Boolean | optional |