This calculates the years between two dates using the actual/365 (fixed) day basis convention. This convention counts the number of calendars between the start and end dates and assumes a year consists of 365 days. This is also known as the Act/365 fixed, A/365 fixed, A/365F and English day basis convention.
actual_365(date1, date2)A date-time object
A date-time object
a numeric value representing the number of years between
date1 and date2.
The year fraction is calculated as: $$\frac{Number of calendar days}{365}$$
The order of date1 and date2 is not important. If date1
is less than date2 then the result will be non-negative. Otherwise,
the result will be negative.
Other counter methods: actual_360,
actual_actual_isda,
is_valid_day_basis,
thirty_360_eu_isda,
thirty_360_eu_plus,
thirty_360_eu, thirty_360_us,
thirty_360, year_frac