Template:Years and days/doc

The Template:Years_and_days shows the equivalent years and days for a count in days, with singular words when 1 year or 1 day. A year is treated as 365.25 days, where 366 days is "1 year, 1 day". The purpose of the template is to reduce a large count of days into the years/days format, but also handle small counts of days as just "n days".

The count of days can range from 0 to many millions, billions, etc, but you should be aware of false precision if giving a long period of time to the nearest day.