.NET Standard DateTime Format Strings

.NET Standard DateTime Format Strings
Specifier	Name	Description
d	Short date pattern	Represents a custom DateTime format string defined by the current ShortDatePattern property.
D	Long date pattern	Represents a custom DateTime format string defined by the current LongDatePattern property.
f	Full date/time pattern (short time)	Represents a combination of the long date (D) and short time (t) patterns, separated by a space.
F	Full date/time pattern (long time)	Represents a custom DateTime format string defined by the current FullDateTimePattern property.
g	General date/time pattern (short time)	Represents a combination of the short date (d) and short time (t) patterns, separated by a space.
G	General date/time pattern (long time)	Represents a combination of the short date (d) and long time (T) patterns, separated by a space.
M or m	Month day pattern	Represents a custom DateTime format string defined by the current MonthDayPattern property.
o	Round-trip date/time pattern	Represents a custom DateTime format string using a pattern that preserves time zone information. The pattern is designed to round-trip DateTime formats, including the Kind property, in text. Then the formatted string can be parsed back using Parse or ParseExact with the correct Kind property value. Equivalent custom format string is "yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK".
R or r	RFC1123 pattern	Represents a custom DateTime format string defined by the current RFC1123Pattern property. The pattern is a defined standard and the property is readonly. Equivalent custom format string is "ddd, dd MMM yyyy HH':'mm':'ss 'GMT'". Does not convert DateTimes to UTC.
s	Sortable date/time pattern; ISO 8601	Represents a custom DateTime format string defined by the current SortableDateTimePattern property. This pattern is a defined standard and the property is read-only. Equivalent custom format string is "yyyy'-'MM'-'dd'T'HH':'mm':'ss".
t	Short time pattern	Represents a custom DateTime format string defined by the current ShortTimePattern property. For example, the custom format string for the invariant culture is "HH:mm".
T	Long time pattern	Represents a custom DateTime format string defined by the current LongTimePattern property. For example, the custom format string for the invariant culture is "HH:mm:ss".
u	Universal sortable date/time pattern	Represents a custom DateTime format string defined by the current UniversalSortableDateTimePattern property. Equivalent custom format string is "yyyy'-'MM'-'dd HH':'mm':'ss'Z'". Does not convert DateTimes to UTC.
U	Universal sortable date/time pattern	Represents a custom DateTime format string defined by the current FullDateTimePattern property. This pattern is the same as the full date/long time (F) pattern. However, formatting operates on the Coordinated Universal Time (UTC) that is equivalent to the DateTime object being formatted.
Y or y	Year month pattern	Represents a custom DateTime format string defined by the current YearMonthPattern property. For example, the custom format string for the invariant culture is "yyyy MMMM".
Any other single character	(Unknown specifier)	An unknown specifier throws a runtime format exception.