Question: how is a julian date written?
Answer: For example, the Julian day number for the day starting at 12:00 UT (noon) on January 1, 2000, was 2 451 545. The Julian Period is a chronological interval of 7980 years; year 1 of the Julian Period was 4713 BC (−4712). The Julian calendar year 2020 is year 6733 of the current Julian Period.