---
title: Calendar.RecurrenceRule.Month
framework: foundation
role: symbol
role_heading: Structure
path: foundation/calendar/recurrencerule/month
---

# Calendar.RecurrenceRule.Month

Uniquely identifies a month in any calendar system.

## Declaration

```swift
struct Month
```

## Topics

### Initializers

- [init(_:isLeap:)](foundation/calendar/recurrencerule/month/init(_:isleap:).md)

### Instance Properties

- [index](foundation/calendar/recurrencerule/month/index.md)
- [isLeap](foundation/calendar/recurrencerule/month/isleap.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [ExpressibleByIntegerLiteral](swift/expressiblebyintegerliteral.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)