libhdate-dev 1.6.02-2.1build3 (riscv64 binary) in ubuntu noble

 LibHdate is a small C,C++ library for Hebrew dates,
 holidays, and reading sequence (parasha). It is using
 the source code from Amos Shapir's "hdate" package fixed and
 patched by Nadav Har'El. The Torah reading sequence
 is from tables by Zvi Har'El.
 .
 This package contains headers and support files required
 to build new applications with libhdate.