MinCal Widget is a free and open-source calendar widget for Android developed by mvmike. It is a simple, yet efficient widget that always displays the current date's month. The widget is resizable at 3x2 and displays all events from your calendars with a symbol set, where a high number of events becomes generic.

The configuration of MinCal Widget is accessible on the widget's top right corner. Pressing on any other part of the widget opens the calendar application. The widget is highly configurable, allowing you to set the start day of the week, calendar type (gregorian or holocene), show declined events, focus on the current week, open calendar on clicked day, theme, symbol set, symbol set color, transparency, and text size.

MinCal Widget supports various languages, including English, Catalan, Chinese (Traditional), Croatian, Dutch, Esperanto, French, German, Lithuanian, Norwegian Bokmål, Polish, Portuguese, Portuguese (Brazil), Punjabi, Punjabi (Pakistan), Russian, Spanish, Turkish, Vietnamese, and Yue. You can also help with translations through their weblate project page.

Overall, MinCal Widget is a great choice for anyone looking for a simple and efficient calendar widget that is free, open-source, and highly configurable.