The following list shows the various patterns that can be used to convert the date/time to a custom formatted string. The patterns are case-sensitive; for example, "MM" is different from "mm".

If the custom pattern contains white-space characters or characters enclosed in single quotation marks, the output string will also contain those characters. Characters not part of a format pattern or not format characters are reproduced 'as it is'.

d The day of the month. Single-digit days will not have a leading zero.

dd The day of the month. Single-digit days will have a leading zero.

ddd The abbreviated name of the day of the week.

dddd The full name of the day of the week.

M The numeric month. Single-digit months will not have a leading zero.

MM The numeric month. Single-digit months will have a leading zero.

MMM The abbreviated name of the month.

MMMM The full name of the month.

y The year without the century. If the year without the century is less than
10, the year is displayed with no leading zero.

yy The year without the century. If the year without the century is less than
10, the year is displayed with a leading zero.

yyyy The year in four digits, including the century.

gg The period or era. This pattern is ignored if the date to be formatted does
not have an associated period or era string.

h The hour in a 12-hour clock. Single-digit hours will not have a leading
zero.

hh The hour in a 12-hour clock. Single-digit hours will have a leading zero.

H The hour in a 24-hour clock. Single-digit hours will not have a leading
zero.

HH The hour in a 24-hour clock. Single-digit hours will have a leading zero.

m The minute. Single-digit minutes will not have a leading zero.

mm The minute. Single-digit minutes will have a leading zero.

s The second. Single-digit seconds will not have a leading zero.

ss The second. Single-digit seconds will have a leading zero.

f The fraction of a second in single-digit precision. The remaining digits are
truncated.

ff The fraction of a second in double-digit precision. The remaining digits are
truncated.

fff The fraction of a second in three-digit precision. The remaining digits
are truncated.

ffff The fraction of a second in four-digit precision. The remaining digits
are truncated.

fffff The fraction of a second in five-digit precision. The remaining digits
are truncated.

ffffff The fraction of a second in six-digit precision. The remaining digits
are truncated.

fffffff The fraction of a second in seven-digit precision. The remaining
digits are truncated.

t The first character in the AM/PM designator.

tt The AM/PM designator.

z The time zone offset ("+" or "-" followed by the hour only). Single-digit
hours will not have a leading zero. For example, Pacific Standard Time is "-8".

zz The time zone offset ("+" or "-" followed by the hour only). Single-digit
hours will have a leading zero. For example, Pacific Standard Time is "-08".

zzz The full time zone offset ("+" or "-" followed by the hour and minutes).
Single-digit hours and minutes will have leading zeros. For example, Pacific
Standard Time is "-08:00".

: The default time separator.

/ The default date separator.

% c Where c is a format pattern if used alone. The "%" character can be
omitted if the format pattern is combined with literal characters or other
format patterns.

\ c Where c is any character. Displays the character literally. To
display the backslash character, use "\\".