gregorian <-> shamsi date time converter
use gregorian2shamsi::*;
fn main(){
let d =Date { day: 15, month: 12, year: 1399 };
println!("{:?}",
convert_to_gregorian(d)
);
}
assert_eq!(
Date{year:1398,month:10,day:11},
convert_to_shamsi(Date { day: 1, month: 1, year: 2020 }));