Date/Time Formats Cheat Sheet by PezMat

R or r

Formats the date according to the RFC112­3Pa­ttern property.
For example, Sun, 02 Mar 2008 16:07:04 GMT
The formatted date does not adjust the value of the date and time.
You must adjust the Date/Time value to GMT before calling the Format function

Displays the Long Date and Long Time according to your current culture's format.
For example, 02 March 2008 16:07:04

General Date
Displays a date and/or time.
For example, 02/03/2008 16:07:04
Date display is determined by your applic­ation's current culture value

Long Date
Displays a date according to your current culture's Long Date format.
For example, 02 March 2008

M or m

Displays the month and the day of a date.
For example, 02 March

Long Time
Displays a time using your current culture's Long Time format; typically includes hours, minutes, seconds.
For example, 16:07:04

Formats the date and time as a sortable index.
For example, 2008-0­3-0­2T1­6:07:04

Time separator
In some locales, other characters may be used to represent the time separator. The time separator separates hours, minutes, and seconds when time values are formatted. The actual character that is used as the time separator in formatted output is determined by your applic­ation's current culture value.

Used to indicate that the following character should be read as a single­-letter format without regard to any trailing letters. Also used to indicate that a single­-letter format is read as a user-d­efined format. See what follows for additional details .

Displays the Day as a number with a leading zero
For example, 02

Displays the Day as a full name
For example, Sunday

Displays the Month as a number with a leading zero
For example, 03

Displays the Month as a full month name
For example, March

Displays the Year in two-digit numeric format with a leading zero, if applicable.
For example, 08

Displays the year in four-digit numeric format.
For example, 2008

Displays the Hour as a number without leading zeros using the 12-hour clock
For example, 4
Use %h if this is the only character in your user-d­efined numeric format.

Displays the Hour as a number without leading zeros using the 24-hour clock
For example, 16
Use %H if this is the only character in your user-d­efined numeric format.

Displays the Minute as a number without leading zeros
For example, 7
Use %m if this is the only character in your user-d­efined numeric format.

Displays the Second as a number without leading zeros
For example, 4
Use %s if this is the only character in your user-d­efined numeric format.

Displays fractions of seconds.
For example ff displays hundredths of seconds, whereas ffff displays ten-th­ous­andths of seconds. You may use up to seven f symbols in your user-d­efined format.
Use %f if this is the only character in your user-d­efined numeric format.

For locales that use a 12-hour clock, displays an uppercase 'AM' with any hour before noon; displays an uppercase 'PM' with any hour between noon and 11:59 P.M.
For example, PM
For locales that use a 24-hour clock, displays nothing.

Displays the timezone offset with a leading zero
For example, +00