Advanced date, time and interval library for Java with sun/moon-astronomy and calendars like Chinese, Coptic, Ethiopian, French Republican, Hebrew, Hijri, Historic Christian, Indian National, Japanese, Julian, Korean, Minguo, Persian, Thai, Vietnamese
See https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.3913697179
This issue just changes the expiration date of leapsecond data.