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Available on winget

Install PerfectCalendar

Zero-bloat Win32 taskbar calendar (~230 KB). Dark mode, flat-file events, bold day highlighting, global hotkey, idle transparency.

Install with winget
winget install --id Gsasl.PerfectCalendar
Upgrade
winget upgrade --id Gsasl.PerfectCalendar
Uninstall
winget uninstall --id Gsasl.PerfectCalendar

About PerfectCalendar

PerfectCalendar is a pure C / Win32 API taskbar calendar that boots silently to the system tray and weighs ~230 KB on disk — no .NET, no WebView2, no background sync daemon. Key features: • Flat-file event scheduling (events.dat — plain text, always yours) • MCM_SETDAYSTATE bitmask highlighting — days with events appear bold • Wildcard recurring events: ****-12-25 (yearly), ****-**-01 (monthly) • Global hotkey (Ctrl+Shift+Space default) — summons to your cursor • Conflict-safe hotkey: shows tray notification instea...

What's new in 1.3.0

v1.3.0 — Full feature release [future updates required suggestions welcome] NEW • Add-Event: inline subclassed EDIT control (Enter = save, Esc = cancel) • Recurring events: ****-MM-DD (yearly) and ****-**-DD (monthly) • Hotkey submenu in tray: 3 presets + Disabled, all check-marked • MOD_NOREPEAT on RegisterHotKey prevents key-repeat flooding • Tray balloon on hotkey conflict — app keeps running normally • MCN_GETDAYSTATE bitmask bold-day highlighting (MCS_DAYSTATE) • ISO week-number column (MCS_WEEKNUMBERS) • Multi-format copy: ISO / US / long form via NM_RCLICK • UTC clock label (GetSystemTime) • Smooth idle transparency fade (WS_EX_LAYERED, TID_FADE timer) • Owner-drawn LISTBOX: recurring events in accent blue • F5 hot-reload events without restart FIXED • Silent tray boot: ShowWindow removed from WinMain — no more aggressive popup on every system startup when Run on Startup enabled • SetWindowSubclass replaces legacy SetWindowLongPtr subclassing • hFontSmall / hSelBrush / hListBrush fully cleaned in WM_DESTROY • All timers explicitly KillTimer'd in WM_DESTROY • Mutex name versioned to avoid collision with older installs

Read release notes

Version history

Version Updated Notes
1.3.0 Unknown v1.3.0 — Full feature release [future updates required suggestions welcome] NEW • Add-Event: inline subclassed EDIT control (Enter = save, Esc = cancel) • Recurring events: ****-MM-DD (yearly) and ****-**-DD (monthly) •...
1.1.0 Unknown No notes