import datetime
ts = 1020643199
dt = datetime.datetime.utcfromtimestamp(ts)
print(dt) # 2002-05-05 23:59:59const ts = 1020643199;
const date = new Date(ts * 1000);
console.log(date.toISOString());
// 2002-05-05T23:59:59.000Zimport java.time.Instant;
import java.time.ZoneOffset;
long ts = 1020643199L;
Instant instant = Instant.ofEpochSecond(ts);
System.out.println(instant);
// 2002-05-05T23:59:59.000Z