As I am always formatting dates and always forgetting the parameters to do so, I am placing them here as a quick reference.

`Dim timeNow as DateTime = DateTime.Now`

Dim timeFormatted as String = rightNow.ToString("MMM dd, yyyy")

`Dim timeNow as DateTime = DateTime.Now`

Dim timeFormatted as String = String.Format("{0:MMM dd, yyyy}", timeNow)

`Dim timeNow As New DateTime(2000, 1, 1, 0, 0, 0)`

Dim timeFormatted As String = timeNow.ToString("dddd - d - MMMM")

' In the U.S. English culture, timeFormatted has the value:

' "Saturday - 1 - January".

timeFormatted = timeNow.ToString("yyyy gg")

' In the U.S. English culture, timeFormatted has the value: "2000 A.D.".

Pattern |
Description |

d |
ShortDatePattern |

D |
LongDatePattern |

f |
Full date and time (long date and short time) |

F |
FullDateTimePattern (long date and long time) |

g |
General (short date and short time) |

G |
General (short date and long time) |

m, M |
MonthDayPattern |

r, R |
RFC1123Pattern |

s |
SortableDateTimePattern (based on ISO 8601) using local time |

t |
ShortTimePattern |

T |
LongTimePattern |

u |
UniversalSortableDateTimePattern using the format for universal time display |

U |
Full date and time (long date and long time) using universal time |

y, Y |
YearMonthPattern |

The table below shows the case-sensative patterns that are available to construct custom patterns.

Pattern |
Description |

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, as defined in AbbreviatedDayNames. |

dddd |
The full name of the day of the week, as defined in DayNames. |

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, as defined in AbbreviatedMonthNames. |

MMMM |
The full name of the month, as defined in MonthNames. |

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 defined in AMDesignator or PMDesignator, if any. |

tt |
The AM/PM designator defined in AMDesignator or PMDesignator, if any. |

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″. |

For additional information see: