Function calendrical_calculations::julian::fixed_from_julian_book_version

pub const fn fixed_from_julian_book_version(
    book_year: i32,
    month: u8,
    day: u8,
) -> RataDie

Get a fixed date from the ymd of a Julian date; years are counted as in Calendrical Calculations by Reingold & Dershowitz, meaning there is no year 0. For instance, near the epoch date, years are counted: -3, -2, -1, 1, 2, 3 instead of -2, -1, 0, 1, 2, 3.

Primarily useful for use with code constructing epochs specified in the bookg