"Men invented time to feel comfortable in space. But it doesn't actually exist. All experience is happening at once." -Albert Einstein
Time measurement unites (via World Encyclopedia of Time)
Hindu units of time - "from microseconds to Trillions of years".
Back to the future: The original time crystal makes a comeback: https://www.sciencemag.org/news/2019/11/back-future-original-time-crystal-makes-comeback