Function readable_diff 

pub fn readable_diff<Tz: TimeZone>(
    start: &DateTime<Tz>,
    end: &DateTime<Tz>,
) -> Option<String>

Format the elapsed time between two timestamps.

Pass both arguments in the same zone to count whole years on that zone’s calendar. Return None for a negative elapsed time.

Example:

use chrono::prelude::*;
use imessage_database::util::dates::readable_diff;

let start = Utc.with_ymd_and_hms(2020, 5, 20, 9, 10, 11).unwrap();
let end = Utc.with_ymd_and_hms(2020, 5, 20, 9, 15, 13).unwrap();
assert_eq!(readable_diff(&start, &end).unwrap(), "5 minutes, 2 seconds");