rxc-amzn

DateTime::format("%Y-%m-%dT%H:%M:%S%.6fZ") does not work correctly for dates before the epoch.

1

repro: ``` use chrono::{DateTime, TimeZone, Utc}; // Should be 1969-12-31T23:59:59.999999Z println!("{}", DateTime::from_timestamp_micros(-1).format("%Y-%m-%dT%H:%M:%S%.6fZ")); Actual vs Expected Results: Microseconds: -1 Actual result: 1970-01-01T00:00:00.000001Z // WRONG: +1us after epoch Expected result: 1969-12-31T23:59:59.999999Z //...