HTML: input type="month"

The month input collects a year and month, such as a billing period, without a specific day.

Minimal example

<label for="billing-month">Billing month</label>
<input id="billing-month" name="billing-month" type="month" required>

The submitted value is normalized as YYYY-MM. The calendar UI and visible formatting can vary between browsers and operating systems.

Common mistakes

• Do not invent a day when the business concept is only a month.
• Use input type="date" when a specific day matters.
• Validate the allowed period and interpret the month consistently on the server.