CLI Calendar

This is a modern 64-bit Windows CLI calendar utility written entirely in C. Designed for speed and minimal resource usage, it provides a clean, 7-column (Monday-Sunday) monthly view directly in your terminal.

Unlike standard command-line calendars, this tool leverages ANSI escape sequences to provide a rich visual experience, including bold headers and a high-visibility highlight for the current day.

It is built using the Win32 API and standard C time libraries, ensuring accurate weekday calculations and leap-year handling through 9999.

Usage:
cal.exe — Shows current month.
cal.exe 10 — Shows October of the current year.
cal.exe 12 2025 — Shows December 2025.
cal.exe --help — Shows help and usage instructions.

License:
Released into the Public Domain

Features

Intelligent Highlighting: Automatically detects and highlights "Today's Date" with a Blue/Black theme.
Smart Parameter Parsing: View the current month by default, or pass specific arguments (e.g., calendar 12 2024) to navigate time.
Leap Year Aware: Full support for Gregorian leap year rules, including February 29th logic.
Compact executable - only 21kb

Project Samples

Project Activity

See All Activity >

Follow CLI Calendar

CLI Calendar Web Site

Other Useful Business Software

MongoDB Atlas runs apps anywhere

Deploy in 115+ regions with the modern database for every enterprise.

MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.

Start Free

Rate This Project

User Reviews

Be the first to post a review of CLI Calendar!

Additional Project Details

Operating Systems

Windows

Intended Audience

Other Audience

User Interface

Command-line

Registered

16 hours ago

Similar Business Software

Trumba

Trumba is an event calendar and registration platform for your website or intranet. Manage all your event data in one place and publish custom calendars for your end users. Trumba currently powers the event calendars for large organizations and small businesses worldwide. Features...

See Software
Proton Mail

Proton Mail is the simplest way to protect your communications with built-in end-to-end encryption. Prevent data breaches, stay compliant with regulations like GDPR and HIPAA, and earn client trust. Protected by Swiss privacy laws and trusted by over 50,000 businesses, Proton Mail keeps your...

See Software
eM Client

Boost your email and skyrocket your productivity with the best email client for Windows and macOS. eM Client is a fully-featured email client with a clean and easy-to-use interface. It also offers features for calendars, tasks, contacts, notes, and chat. eM Client's compatibility is...

See Software
Tockify

Tockify includes a visually rich pinboard calendar as well as attractive modern takes on month grid and list/agenda style calendars. All styles look great on mobile too. Tockify blends seamlessly into your site to improve its looks and impress your visitors. You don't have to settle for a...

See Software
Calendly

Calendly is a scheduling automation platform that helps individuals, teams, and enterprises book meetings without the back-and-forth emails. Share custom booking links, set availability preferences, and automate reminders, follow-ups, and calendar syncing. Calendly supports one-on-one, group,...

See Software
Noodle

Noodle is the all-in-one enterprise platform that removes the stress of working across emails, file servers, task managers, spreadsheets, chats, meetings, etc. Teams that use their Noodle communicate better and are more productive. Your people will see where everything is, understand what...

See Software