---
title: Date.FormatStyle.Symbol.DayPeriod
framework: foundation
role: symbol
role_heading: Structure
path: foundation/date/formatstyle/symbol/dayperiod
---

# Date.FormatStyle.Symbol.DayPeriod

A type that specifies a format for the time period in a date format style.

## Declaration

```swift
struct DayPeriod
```

## Overview

Overview The type Date.FormatStyle.Symbol.DayPeriod includes static factory methods that create custom Date.FormatStyle.Symbol.DayPeriod objects.  |   |   |   |  The day period format style may be uppercase or lowercase depending on the locale and other options. For more information about formatting dates, see the Date.FormatStyle.

## Topics

### Modifying a Day Period

- [conversational(_:)](foundation/date/formatstyle/symbol/dayperiod/conversational(_:).md)
- [standard(_:)](foundation/date/formatstyle/symbol/dayperiod/standard(_:).md)
- [with12s(_:)](foundation/date/formatstyle/symbol/dayperiod/with12s(_:).md)

### Supporting Enumerations

- [Date.FormatStyle.Symbol.DayPeriod.Width](foundation/date/formatstyle/symbol/dayperiod/width.md)

### Comparing Day Periods

- [==(_:_:)](foundation/date/==(_:_:).md)

### Type Properties

- [omitted](foundation/date/formatstyle/symbol/dayperiod/omitted.md)

## Relationships

### Conforms To

- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Modifying Date Style Format Symbols

- [Date.FormatStyle.Symbol.CyclicYear](foundation/date/formatstyle/symbol/cyclicyear.md)
- [Date.FormatStyle.Symbol.Day](foundation/date/formatstyle/symbol/day.md)
- [Date.FormatStyle.Symbol.DayOfYear](foundation/date/formatstyle/symbol/dayofyear.md)
- [Date.FormatStyle.Symbol.Era](foundation/date/formatstyle/symbol/era.md)
- [Date.FormatStyle.Symbol.Hour](foundation/date/formatstyle/symbol/hour.md)
- [Date.FormatStyle.Symbol.Minute](foundation/date/formatstyle/symbol/minute.md)
- [Date.FormatStyle.Symbol.Month](foundation/date/formatstyle/symbol/month.md)
- [Date.FormatStyle.Symbol.Quarter](foundation/date/formatstyle/symbol/quarter.md)
- [Date.FormatStyle.Symbol.Second](foundation/date/formatstyle/symbol/second.md)
- [Date.FormatStyle.Symbol.SecondFraction](foundation/date/formatstyle/symbol/secondfraction.md)
- [Date.FormatStyle.Symbol.StandaloneMonth](foundation/date/formatstyle/symbol/standalonemonth.md)
- [Date.FormatStyle.Symbol.StandaloneQuarter](foundation/date/formatstyle/symbol/standalonequarter.md)
- [Date.FormatStyle.Symbol.StandaloneWeekday](foundation/date/formatstyle/symbol/standaloneweekday.md)
- [Date.FormatStyle.Symbol.TimeZone](foundation/date/formatstyle/symbol/timezone.md)
- [Date.FormatStyle.Symbol.VerbatimHour](foundation/date/formatstyle/symbol/verbatimhour.md)