A Time (and Date) library for Deno with formatting support.
import {Thyme} from 'https://deno.land/x/thyme/mod.ts';
const apollo11Landing = new Thyme(Date.UTC(1969, 6, 20, 20, 17, 40));
console.log(apollo11Landing.formatSimple('YYYY-MM-DD_hh:mm:ss.iii'));
// Outputs '1969-07-20_20:17:40.000'
Note that the initialization syntax is not final, eventually you will be able to construct it like this:
Thyme.parseECMA('1969-07-20T20:17:40')