What is Calendar-On-Demand?

Calendar-On-Demand is a lightweight, distraction-free desktop widget for Windows and macOS that keeps your Google Calendar and Google Tasks always visible on your screen or desktop background without keeping bulky browser tabs open.

How does Calendar-On-Demand differ from Notion Calendar or Google Calendar Web?

Unlike Notion Calendar or web calendar tabs that require opening full-size windows and alt-tabbing away from your work, Calendar-On-Demand sits unobtrusively on your desktop or stays pinned always-on-top. It uses minimal system memory, syncs instantly in both directions, and lets you glance at or manage your schedule with zero clicks.

Is Calendar-On-Demand free and open source?

Yes, Calendar-On-Demand is 100% free and open source under the MIT license. There are no paywalls, subscriptions, or hidden charges.

Is my Google account data secure and private?

Yes. Calendar-On-Demand authenticates directly with Google APIs using official OAuth 2.0 via your system's default web browser. All tokens and calendar data are stored strictly on your local computer. No events, emails, or personal information are ever transmitted to any third-party server.

Can I connect and manage multiple Google accounts?

Yes. You can connect multiple Google accounts (such as personal and work accounts) and toggle calendars to view unified or filtered daily/weekly schedules in one place.

Does Calendar-On-Demand support two-way synchronization?

Yes. Any event or Google Task you create, edit, or complete inside Calendar-On-Demand syncs directly to Google Calendar in real time. Changes made on your phone or browser also update automatically.

Which operating systems are supported?

Calendar-On-Demand supports Windows 10 & 11 (64-bit) and macOS (Apple Silicon M-series & Intel).

Can I customize the widget position, size, and transparency?

Yes. You can freely resize, drag, and position the widget anywhere on your display, pin it to stay always on top or lock it to your desktop wallpaper, and adjust opacity to fit your workspace aesthetic.

Calendar-On-Demand | Your Desktop's New Best Friend

v1.6.0 Oct 16, 2026 NEW

Tasks Drawer, Drag & Drop Time-blocking & Smart Sync:

Local Tasks Drawer (Alt+T): Built-in lightweight, distraction-free desktop todo list drawer. Add, edit, check off, and delete tasks instantly with real-time active counter badges and filter tabs (All / Active / Done). 100% offline-first local persistence.
Drag & Drop Time-blocking: Seamlessly drag any task from the drawer directly onto Month day cells (for all-day/flexible events) or Weekly Timeline hourly slots to instantly schedule your day without manual typing.
Smart Multi-Day Completion Sync: Checking off an event on the calendar automatically completes the task in the drawer once all scheduled sessions are finished. Scheduled a task across multiple days? The task stays active until the final session is checked.
Safe Event Deletion: Removing a scheduled time block from the calendar cancels the time slot while safely preserving the task in your drawer for future rescheduling.
UI Polish & Parser Fixes: Re-engineered the Settings modal with zero horizontal overflow and full Logout button visibility. Fixed natural language time parsing regex to prevent trailing text truncation (e.g. Test 1500).

v1.5.7 Sep 30, 2026

Global Toggle Hotkey Presets & Zero-Drift Desktop Positioning:

Customizable Global Toggle Hotkeys: Added curated hotkey presets in Settings (Ctrl+Shift+C, Alt+C, Ctrl+Alt+C, Alt+Space, None) with native macOS (Cmd) adaptation. Instantly pops the widget above active windows and drops it back down to the desktop without manual clicks.
Zero-Drift Startup Window Positioning: Eliminated multi-pixel coordinate drifting on system boot and restart by suppressing fractional DPI settling events during a 1500ms grace period and enforcing precise rounded coordinate locking.
Quality Assurance & Focus Reliability: Seamlessly returns OS window focus to previous background applications when dismissed from foreground, verified against strict ESLint static analysis.

v1.5.6 Sep 29, 2026

Hotfix: Quick Add Timezone Offset Scope & Auto-Save Event Persistence:

Fixed Timezone Offset Scope in Event Creation: Corrected missing offset declaration in saveCurrentEvent() that caused timed events to throw a ReferenceError upon save.
Hardened Modal Auto-Save Exception Handling: Wrapped handleAutoSaveAndClose() in guaranteed try...finally to ensure the modal closes and state resets cleanly upon outside click regardless of API status.

v1.5.5 Sep 29, 2026

Visual & Micro-Interactions Overhaul — Monochrome SVG Header Icons, Glassmorphic Settings & Ambient Glows:

Precision Monochrome SVG Vector Icons: Replaced all legacy header emojis with crisp 18px monochrome SVG line icons (Navigation, Today, Week/Month View Toggle, Position Lock, and Settings) on tactile glass buttons with specular rim highlights.
Ambient Hover Glows: Added subtle glass rim highlights and ambient accent glow to Month day cells, event tiles, and timeline cards, elevating the widget's physical desktop presence.
Luminous Current-Time Indicator: Upgraded the Weekly Timeline's red Now Line and origin indicator dot with a dual-stage luminous neon glow for effortless at-a-glance time orientation.
Settings Panel Consistency & Dark Glass Dropdowns: Standardized all dropdown selectors (Default View, Event Time Style, Start of Week) to custom dark glass dropdowns with clean chevron arrows. Re-engineered the + Add Account button with a sleek dashed border and glowing glass styling.
Pixel-Perfect Right-Aligned Toggle Switches: Standardized all switch components across Behavior, Accounts, and Calendars to guarantee razor-straight right-edge vertical alignment regardless of label length.

v1.5.4 Sep 29, 2026

Multi-Day All-Day Events, Bright Wallpaper Legibility, Anti-Truncation Todo Layout & Instant 0ms Navigation:

Multi-Day All-Day Events (Google Calendar Parity): Seamlessly visualizes multi-day all-day events across continuous day cells in both Month Grid and Weekly Timeline (top all-day row) with high-contrast dual dashed ribbons (multi-day-start, multi-day-middle, multi-day-end).
Dedicated Date Range Selector: Added a clean date range picker (Date [Start] ~ [End]) directly into the Add/Edit task modal with auto-enforced all-day mode for multi-day spans.
Anti-Truncation 2-Line Todo Layout: Re-architected task list items into a 2-line layout, giving event titles 100% width while placing time badges, account tags, and video meeting join buttons into a compact sub-row.
Bright Wallpaper Legibility: Upgraded day headers (MON, TUE, WED...) from 40% to 85% opacity (--text-muted) with 700 bold weight and weekend accents (Sun: #ff5252, Sat: #448aff). Added high-contrast backdrop tracks to the Weekly Timeline hour gutter and adaptive drop shadows (--label-shadow) for crisp readability over bright or white wallpapers.
Instant 0ms Optimistic Navigation: Eliminates network latency lag when browsing between weeks/months via instant 0ms DOM updates paired with debounced background synchronization and race-condition safety.

v1.5.3 Sep 22, 2026

Google Calendar 24 Official Colorways, Adaptive Contrast Typography & Time Picker Auto-Save:

Google Calendar 24 Official Colorways: Integrated Google Calendar's native eventLabelVersion: 1 API supporting all 24 official colorways (including Cocoa) with full two-way sync and clean 24-color grid selection in the Quick Add modal.
Zero Title Tag Pollution: Replaced legacy [COLOR:#hex] tags with native event label IDs, keeping event titles clean across Google Calendar web, mobile apps, and widget.
Adaptive Contrast Typography: Dynamic luminance calculations ensure bold dark text (#18181b) on bright/medium badges and crisp white text on deep dark badges for peak readability.
Time Picker Layout & Auto-Save Polish: Expanded time picker inputs to eliminate 12h/24h text truncation, and fixed auto-save detection so modifying only event times reliably persists on blur.

v1.5.2 Sep 22, 2026

First-Launch Window Centering & Off-Screen Display Protection:

First-Launch Center & Frontmost Focus: Guaranteed that the calendar widget spawns dead center on the primary display and pops in front of full-screen windows on first launch.
Off-Screen Display Protection: Added multi-monitor validation using active display bounds to detect disconnected external monitors or corrupted coordinates, automatically rescuing and resetting the window position.
Second-Instance Auto-Rescue: Re-launching the app via desktop shortcut automatically rescues any off-screen window, restores minimized states, and brings it directly into focus.

v1.5.1 Sep 11, 2026

Cross-Midnight Event Continuity, Desktop Notifications & Ko-fi Support:

Desktop Notifications: Stay on schedule with native desktop alerts. Configure reminders in Settings (5m, 10m, 15m, or 30m before upcoming events).
Cross-Midnight Event Continuity: Seamlessly visualizes overnight events across day boundaries with matching dashed borders and continuation arrows (→ / ↩) in both Weekly Timeline and Month Grid views.
Overnight Event Creation Fix: Fixed Google API event creation error for events ending after midnight by automatically scheduling the end time to the next day.
Buy Me a Coffee (Ko-fi): Added a discreet support button in Settings for users wishing to support ongoing development. ☕
Reliability Polish: Timezone boundary safety improvements via localized date conversions.

v1.5.0 Sep 07, 2026 Major

Weekly Timeline View & Smart Time Customization:

Google Calendar-Style Weekly Timeline: 24-hour vertical timeline grid with accurate duration block heights, automatic overlapping event cluster columns, top all-day event row, real-time red current time indicator line, and smart auto-scroll.
Seamless View Toggle: Quick header icon toggle (📅/📆) and keyboard shortcuts (W for Week, M for Month) with customizable default view in Settings.
Event Micro-Time Display: New customizable time styling in Settings (Micro-time on top 11:30 ~ 13:40, Start time only, or Compact duration) with contrast-safe adaptive text.
End Time Retention Fix: Preserves user-customized durations when adjusting start times or quick typing tasks.
Window Min-Size Enforcement: Fixed Windows frameless drag resize bypass with rigid 370×430 minimum size limits and flexible 7-column grid scaling.

v1.4.1 Aug 31, 2026

Direct Time Picker & Smart Time Visibility:

Direct Time Picker: Easily set event start and end times directly with an All-day toggle chip and time picker inputs.
Event Time Display: Added automatic time prefixes to calendar grid items and smart time badges to task lists.
Smart Title De-duplication: Automatically cleans up duplicate time strings in event titles for existing and new tasks.

v1.4.0 Aug 29, 2026 Major

Multi-Account Sync & Major Customization Update:

Multi-Account Support: Connect and sync multiple Google accounts simultaneously with per-account toggles, badges, and hover tooltips.
Custom Today Highlight: Choose any custom neon color for the today indicator in Settings > Appearance.
Sound Effects Toggle: Added option to mute completion chimes in Settings > Behavior.
Native OS Dragging: Fast, zero-latency window dragging with draggable header bar.
Responsive Grid Resizing: Calendar cells proportionally adjust on window resize, preventing cutoffs on smaller dimensions.
Window Position Drift Fix: Window bounds and DPI scaling preserved precisely across reboots.

v1.3.13 Aug 22, 2026

Fix: Removed forced account chooser screen during automatic Google login.

v1.3.10 Aug 21, 2026

Fix: Crash on consecutive requests to OAuth server.

v1.3.6 Aug 21, 2026 Security

Migrated Google OAuth flow from embedded popup to the System Default Browser. Complies with Google's latest security policies blocking OAuth in embedded webviews.

v1.0.9 Jul 25, 2026

Added in-app update notification indicators. Implemented clickable updates to trigger instant quit-and-install from the widget.

v1.0.8 Jul 25, 2026

Optimized background sync interval to 15 minutes. Added exponential backoff retry (1m → 2m → 4m → 15m) for API errors.

v1.0.7 Jun 27, 2026

Enabled automatic update checks on startup. Updated release script to upload metadata to GitHub.

v1.0.4 Jun 27, 2026

Fixed window sizing bug with position locking. Resolved blank white auth window flashing on sleep-wakeup.

v1.0.2 Jun 20, 2026

Added sound feedback on task completion. Updated UI to glass-morphism with micro-animations.

v1.0.0 Apr 1, 2026

Initial public release.

Your Calendar.
Always There.

Designed for Focus

Aero Glass UI

Multi-Account Sync

10 Pastel Colorways

Two-way Sync

Simple Scheduling

Magic URLs

Real data, live on your desktop

Loved by Desktop Minimalists

What's New

Frequently Asked Questions

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