# JW Calendar
An offline-first calendar and date utility for Linux. Browse month and year layouts, inspect ISO week and day-of-year details, and convert civil dates without relying on an internet connection.
## Calendar tools
See month grids with Sunday or Monday week starts and a compact year view. The desktop window lets you move between months, select dates, and inspect date details beside the calendar.
## Command line
``` jwcalendar month 2027 1 jwcalendar year 2027 jwcalendar date 2027-01-01 jwcalendar day-of-year 2027-07-01 jwcalendar holidays 2027 ```
## Date conventions
Date arithmetic is timezone independent. ISO week-year boundaries follow ISO-8601. The Julian calendar, Julian Day Number, and ordinal day-of-year are separate tools with distinct labels. The holiday command lists US federal holidays and marks observed dates.
## Privacy
Calendar calculations run locally. No account is needed, and the app does not collect analytics or transmit personal calendar data.
## Calendar resources
Source code and support: [GitHub repository](https://github.com/karencohenjw/jwcalendar-linux) · [Report an issue](https://github.com/karencohenjw/jwcalendar-linux/issues).
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Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
If you’re running Ubuntu 16.04 LTS (Xenial Xerus) or later, including Ubuntu 18.04 LTS (Bionic Beaver) and Ubuntu 20.04 LTS (Focal Fossa), you don’t need to do anything. Snap is already installed and ready to go.
For versions of Ubuntu between 14.04 LTS (Trusty Tahr) and 15.10 (Wily Werewolf), as well as Ubuntu flavours that don’t include snap by default, snap can be installed from the Ubuntu Software Centre by searching for snapd.
Alternatively, snapd can be installed from the command line:
sudo apt update
sudo apt install snapd
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
To install JW Calendar, simply use the following command:
sudo snap install jwcalendar
Browse and find snaps from the convenience of your desktop using the snap store snap.
Interested to find out more about snaps? Want to publish your own application? Visit snapcraft.io now.