hcal(1) on Linux
The text 7db46f9e8d88, as Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
Hebrew date example programs for libhdate, a library that help use hebrew dates. 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.