• First things first, either sign up or log in to your Adalo account.
• Hit that "Create New App" button.
• Pick a template or, if you're feeling adventurous, start from scratch.

• Head over to the "Database" section on the left panel.
• Click "Add Collection" and name it "Events" (or whatever suits your fancy).
• Add properties to the Events collection:
• Name (Text)
• Date (Date)
• Description (Text)
• Any other fields you think are necessary

• Go back to the main editor.
• Drag and drop components to design your interface:
• Use "Text" components for headers like "My Custom Calendar".
• Use "List" components to show event details.

• Drag and drop a "Form" component.
• Link it to the "Events" collection.
• Add fields to the form that match the properties from the collection (e.g., Name, Date, Description).
• Don't forget to include a Date Picker component for the Date field.

• Drag and drop a "List" component to show events.
• Configure the list to display items from the "Events" collection.
• Choose the properties to be shown, like Name and Date.
• Style the list however you like.

• Use the "Filter" option on the list component:
• Set up a filter to show events only on selected dates or between date ranges.
• You can use custom filters to show events based on other criteria.

• If you want a multi-day or month view:
• Add "Icons" or "Buttons" to navigate between days/weeks/months.
• Set actions to these buttons to change date ranges.

• Preview the app by clicking on the preview button.
• Test adding, viewing, and filtering events.
• Make sure all UI elements work as expected and make any necessary adjustments.

• Once you're happy with everything, click on the "Publish" button.
• Follow the steps to make your custom calendar available to users.

Feel free to add extra features like event notifications, repetitions, or custom styling using Adalo's component library.