中文行事曆軟體 - Efficient Calendar，類似Google日曆離線版，可以在行事曆上新增事件或任務，設定主題、地點、開始時間、結束時間、重要性、標籤、提醒時間及音效，夾帶任何附件檔或內部檔案連結、設定事件重複週期、備註文字，免安裝可攜版可以儲存於USB隨身碟使用，並且設定開啟密碼保護。（阿榮福利味）
下載連結→ https://www.azofreeware.com/p/efficient-calendar.html
官方網站：Efficient Software
軟體性質：免費軟體（有付費版）
介面語言：繁體中文（含多國語系）
系統需求：Windows
Efficient Calendar is an elegant and easy-to-use scheduler, planner and reminder. Multiple calendar views, such as Day, Week, Month and Year views as well as list view are available so you can better arrange and track your events. By setting subtasks at any level, you can better organize and manage the to-do list. All appointments, meetings, events and tasks can be reminded in time as configured, and you will never miss any important things!