Check that the year is in the correct format e.g. '2001-2002' is correct and returns TRUE, '2001' is not correct and returns FALSE

Check that the year is in the correct format e.g. '2001-2002' is correct and returns TRUE, '2001' is not correct and returns FALSE

validate_year(year, throw_error = TRUE)

Arguments

year	the year or years to validate
throw_error	whether to throw an error if the year is invalid