hdate-applet software package provides Hebrew calendar applet, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install hdate-applet
hdate-applet is installed in your system.
Make ensure the hdate-applet package were installed using the commands given below,
$ sudo dpkg-query -l | grep hdate-applet *
You will get with hdate-applet package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | GNOME |
| Package | hdate-applet |
| Version | 0.15.11-2 |
| Description | Hebrew calendar applet |
| Sub Section | GNOME |