struct · iOS 15.0+ · SDK 27.1
struct DayA type that specifies the format for a day in a date format style. The ``Date/FormatStyle/Symbol/Day`` type includes static factory variables and methods that create custom ``Date/FormatStyle/Symbol/Day`` objects: |Factory variable|Description| |---|---| | ``defaultDigits`` | The minimum number of digits that shows the numeric day of month. For example, `1`, `18`. | | ``julianModified(minimumLength:)`` | The modified Julian day. The field length specifies the minimum number of digits, zero-padded if necessary. For example, `2451334`. | | ``ordinalOfDayInMonth`` | The ordinal of the day in the month. For example, the second Wednesday in July would yield `2`. | | ``twoDigits`` | The two-digit numeric day of month, zero-padded if necessary. For example, `01`, `18`. | To customize the day format in a string representation of a `Date`, use ``Date/FormatStyle/day(_:)``. The following example shows a variety of ``Date/FormatStyle/Symbol/Day`` formats applied to a date. ```swift let meetingDate = Date() // Feb 9, 2021 at 3:00 PM meetingDate.formatted(Date.FormatStyle().day(.defaultDigits)) // 9 meetingDate.formatted(Date.FormatStyle().day(.ordinalOfDayInMonth)) // 2 (second Tuesday of the month) meetingDate.formatted(Date.FormatStyle().day(.twoDigits)) // 09 meetingDate.formatted(Date.FormatStyle().day(.julianModified(minimumLength: 12))) // 0002459255 meetingDate.formatted(Date.FormatStyle().day()) // 9 ``` If no format is specified as a parameter, the ``defaultDigits`` static variable is the default format. For more information about formatting dates, see the ``Date/FormatStyle``.
static get ordinalOfDayInMonth(): Date_FormatStyle_Symbol_Daystatic var ordinalOfDayInMonth: Date.FormatStyle.Symbol.Day { get }Ordinal of day in month. For example, the 2nd Wed in July would yield `2`.
static get defaultDigits(): Date_FormatStyle_Symbol_Daystatic var defaultDigits: Date.FormatStyle.Symbol.Day { get }Minimum number of digits that shows the full numeric day of month. For example, `1`, `18`.
static julianModified(minimumLength?: number): Date_FormatStyle_Symbol_Daystatic func julianModified(minimumLength: Int = 1) -> Date.FormatStyle.Symbol.DayThe field length specifies the minimum number of digits, with zero-padding as necessary. This is different from the conventional Julian day number in two regards. First, it demarcates days at local zone midnight, rather than noon GMT. Second, it is a local number; that is, it depends on the local time zone. It can be thought of as a single number that encompasses all the date-related fields. For example, `2451334`.
static get omitted(): Date_FormatStyle_Symbol_Daystatic let omitted: Date.FormatStyle.Symbol.DayThe option for not including the symbol in the formatted output.
static get twoDigits(): Date_FormatStyle_Symbol_Daystatic var twoDigits: Date.FormatStyle.Symbol.Day { get }Two-digit, zero-padded if necessary. For example, `01`, `18`.
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