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# Calendar.RecurrenceRule.Month

Uniquely identifies a month in any calendar system.

```
struct Month
```

## Topics

### Initializers

[`init(Int, isLeap: Bool)`](/documentation/Foundation/Calendar/RecurrenceRule/Month/init(_:isLeap:))

### Instance Properties

[`var index: Int`](/documentation/Foundation/Calendar/RecurrenceRule/Month/index)

[`var isLeap: Bool`](/documentation/Foundation/Calendar/RecurrenceRule/Month/isLeap)

## Relationships

### Conforms To

[`Encodable`](/documentation/Swift/Encodable)

[`ExpressibleByIntegerLiteral`](/documentation/Swift/ExpressibleByIntegerLiteral)

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Escapable`](/documentation/Swift/Escapable)

[`Decodable`](/documentation/Swift/Decodable)

[`Copyable`](/documentation/Swift/Copyable)

---

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