This template returns the number of weeks that have elapsed between two dates. If the second set of parameters is not included it will automatically calculate the days between a given date and today.
Usage
Each date can be entered in a single parameter, or each date can be entered as three parameters: year, month, day.
{{age in weeks|month1=6|day1=14|year1=1946|month2=8|day2=19|year2=1946}} → 9
{{age in weeks|1946|6|14|1946|8|19}} → 9
{{age in weeks|1946-6-14|1946-8-19}} → 9
{{age in weeks|14 June 1946|Aug 19, 1946}} → 9
{{age in weeks|month1=11|day1=07|year1=2012}} → 655
{{age in weeks|7 November 2012}} → 655
An error is shown if an entered date is not valid (1900 was not a leap year).
{{age in weeks|31 January 1899|29 February 1900}} → Error: Second date should be year, month, day
Combines functions of {{Birth date}}, {{birth-date}}, {{birth date and age}}, {{birth year and age}}, {{death date}}, {{death-date}}, {{death date and age}}, and {{death year and age}}.
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.
