calculate date interval with chrono.
https://gpgkd906.github.io/datecomponent/datecomponent/
```rust use chrono::prelude::*; use datecomponent::datecomponent;
fn main() { let date1 = Utc.ymd(2015, 4, 20).andhms(0, 0, 0); let date2 = Utc.ymd(2015, 12, 19).andhms(0, 0, 0);
let date_interval = date_component::calculate(&date1, &date2);
println!("{:?}", date_interval);
} // DateComponent { year: 0, month: 7, day: 29, seconds: 20995200, minutes: 349920, hours: 5832, interval_day: 243, invert: false } ```