[tz] JavaScript IANA date/time library, now with support for leap seconds, TAI, TDT

[Tony Finch]

John Sauter via tz <tz at iana.org> wrote:
>
> Based on the way the Earth has been rotating recently, the next leap
> second will be around the end of this decade, and it will be a negative
> leap second.

Yikes! I have re-calculated the "PREDICTIONS" formulae from the latest
Bulletin A and I get the numbers below (which agree with your statement).

https://datacenter.iers.org/data/latestVersion/6_BULLETIN_A_V2013_016.txt

2022-01-01 MJD 59580 UT1-UTC -0.077349 +/- 0.015906
2023-01-01 MJD 59945 UT1-UTC +0.017592 +/- 0.031025
2024-01-01 MJD 60310 UT1-UTC +0.112533 +/- 0.043922
2025-01-01 MJD 60676 UT1-UTC +0.207565 +/- 0.055679
2026-01-01 MJD 61041 UT1-UTC +0.302505 +/- 0.066625
2027-01-01 MJD 61406 UT1-UTC +0.397446 +/- 0.076999
2028-01-01 MJD 61771 UT1-UTC +0.492388 +/- 0.086926
2029-01-01 MJD 62137 UT1-UTC +0.587419 +/- 0.096513
2030-01-01 MJD 62502 UT1-UTC +0.682360 +/- 0.105767

Tony.
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