Add chrono to your project.
cargo add chrono
Convert the date.
use chrono::{DateTime, Utc};
use std::time::SystemTime;
fn iso_date() -> String {
let now = SystemTime::now();
let now: DateTime<Utc> = now.into();
return now.to_rfc3339();
}
// 2022-11-23T07:49:18.054044+00:00