Timestamps

const ts = 1777399660025;
new Date(ts).toISOString();
// "2026-04-28T22:41:00.025Z"

from datetime import datetime, UTC
ts = 1777399660025
datetime.fromtimestamp(ts / 1000, tz=UTC).isoformat()
# '2026-04-28T22:41:00.025000+00:00'

package main

import (
    "fmt"
    "time"
)

func main() {
    ts := int64(1777399660025)
    fmt.Println(time.UnixMilli(ts).UTC().Format(time.RFC3339Nano))
    // 2026-04-28T22:41:00.025Z
}

use chrono::{DateTime, Utc};
let ts: i64 = 1777399660025;
let dt: DateTime<Utc> = DateTime::from_timestamp_millis(ts).unwrap();
println!("{}", dt.to_rfc3339());
// 2026-04-28T22:41:00.025+00:00