| Format specifier | Description | Examples |
| "d" | The day of the month, from 1 through 31. | 6/1/2009 1:45:30 PM -> 1 6/15/2009 1:45:30 PM -> 15 |
| "dd" | The day of the month, from 01 through 31.. | 6/1/2009 1:45:30 PM -> 01 6/15/2009 1:45:30 PM -> 15 |
| "ddd" | The abbreviated name of the day of the week. | 6/15/2009 1:45:30 PM -> Mon (en-US) 6/15/2009 1:45:30 PM -> Пн (ru-RU) 6/15/2009 1:45:30 PM -> lun. (fr-FR) |
| "dddd" | The full name of the day of the week. | 6/15/2009 1:45:30 PM -> Monday (en-US) 6/15/2009 1:45:30 PM -> 6/ |
| "f" | The tenths of a second in a date and time value.. | 6/15/2009 13:45:30.617 -> 6 6/15/2009 13:45:30.050 -> 0 |
| "ff" | The hundredths of a second in a date and time value. | 6/15/2009 13:45:30.617 -> 61 6/15/2009 13:45:30.005 -> 00 |
| "fff" | The milliseconds in a date and time value. | 6/15/2009 13:45:30.617 -> 617 6/15/2009 13:45:30.0005 -> 000 |
| "ffff" | The ten thousandths of a second in a date and time value.. | 6/15/2009 13:45:30.6175 -> 6175 6/15/2009 13:45:30.00005 -> 0000 |
| "fffff" | The hundred thousandths of a second in a date and time value. | 6/15/2009 13:45:30.61754 -> 61754 6/15/2009 13:45:30.000005 -> 00000 |
| "ffffff" | The millionths of a second in a date and time value. | 6/15/2009 13:45:30.617542 -> 617542 6/15/2009 13:45:30.0000005 -> 000000 |
| "fffffff" | The ten millionths of a second in a date and time value. | 6/15/2009 13:45:30.6175425 -> 6175425 6/15/2009 13:45:30.0001150 -> 0001150 |
| "F" | If non-zero, the tenths of a second in a date and time value. | 6/15/2009 13:45:30.617 -> 6 6/15/2009 13:45:30.050 -> (no output) |
| "FF" | If non-zero, the hundredths of a second in a date and time value. | 6/15/2009 13:45:30.617 -> 61 6/15/2009 13:45:30.005 -> (no output) |
| "FFF" | If non-zero, the milliseconds in a date and time value. . | 6/15/2009 13:45:30.617 -> 617 6/15/2009 13:45:30.0005 -> (no output) |
| "FFFF" | If non-zero, the ten thousandths of a second in a date and time value. . | 6/1/2009 13:45:30.5275 -> 5275 6/15/2009 13:45:30.00005 -> (no output) |
| "FFFFF" | If non-zero, the hundred thousandths of a second in a date and time value. | 6/15/2009 13:45:30.61754 -> 61754 6/15/2009 13:45:30.000005 -> (no output) |
| "FFFFFF" | If non-zero, the millionths of a second in a date and time value. | 6/15/2009 13:45:30.617542 -> 617542 6/15/2009 13:45:30.0000005 -> (no output) |
| "FFFFFFF" | If non-zero, the ten millionths of a second in a date and time value. | 6/15/2009 13:45:30.6175425 -> 6175425 6/15/2009 13:45:30.0001150 -> 000115 |
| "g", "gg" | The period or era. | 6/15/2009 1:45:30 PM -> A.D. |
| "h" | The hour, using a 12-hour clock from 1 to 12. | 6/15/2009 1:45:30 AM -> 1 6/15/2009 1:45:30 PM -> 1 |
| "hh" | The hour, using a 12-hour clock from 01 to 12. . | 6/15/2009 1:45:30 AM -> 01 6/15/2009 1:45:30 PM -> 01 |
| "H" | The hour, using a 24-hour clock from 0 to 23. | 6/15/2009 1:45:30 AM -> 1 6/15/2009 1:45:30 PM -> 13 |
| "HH" | The hour, using a 24-hour clock from 00 to 23. | 6/15/2009 1:45:30 AM -> 01 6/15/2009 1:45:30 PM -> 13 |
| "K" | Time zone information. | With DateTime values: 6/15/2009 1:45:30 PM, Kind Unspecified -> 6/15/2009 1:45:30 PM, Kind Utc -> Z 6/15/2009 1:45:30 PM, Kind Local -> -07:00 (depends on local computer settings) With DateTimeOffset values: 6/15/2009 1:45:30 AM -07:00 --> -07:00 6/15/2009 8:45:30 AM +00:00 --> +00:00 |
| "m" | The minute, from 0 through 59. | 6/15/2009 1:09:30 AM -> 9 6/15/2009 1:09:30 PM -> 9 |
| "mm" | The minute, from 00 through 59. | 6/15/2009 1:09:30 AM -> 09 6/15/2009 1:09:30 PM -> 09 |
| "M" | The month, from 1 through 12. | 6/15/2009 1:45:30 PM -> 6 |
| "MM" | The month, from 01 through 12. | 6/15/2009 1:45:30 PM -> 06 |
| "MMM" | The abbreviated name of the month. | 6/15/2009 1:45:30 PM -> Jun (en-US) 6/15/2009 1:45:30 PM -> juin (fr-FR) 6/15/2009 1:45:30 PM -> Jun (zu-ZA) |
| "MMMM" | The full name of the month. | 6/15/2009 1:45:30 PM -> June (en-US) 6/15/2009 1:45:30 PM -> juni (da-DK) 6/15/2009 1:45:30 PM -> uJuni (zu-ZA) |
| "s" | The second, from 0 through 59. | 6/15/2009 1:45:09 PM -> 9 |
| "ss" | The second, from 00 through 59. | 6/15/2009 1:45:09 PM -> 09 |
| "t" | The first character of the AM/PM designator. . | 6/15/2009 1:45:30 PM -> P (en-US) 6/15/2009 1:45:30 PM -> 午 (ja-JP) 6/15/2009 1:45:30 PM -> (fr-FR) |
| "tt" | The AM/PM designator. | 6/15/2009 1:45:30 PM -> PM (en-US) 6/15/2009 1:45:30 PM -> 午後 (ja-JP) 6/15/2009 1:45:30 PM -> (fr-FR) |
| "y" | The year, from 0 to 99. | 1/1/0001 12:00:00 AM -> 1 1/1/0900 12:00:00 AM -> 0 1/1/1900 12:00:00 AM -> 0 6/15/2009 1:45:30 PM -> 9 |
| "yy" | The year, from 00 to 99. | 1/1/0001 12:00:00 AM -> 01 1/1/0900 12:00:00 AM -> 00 1/1/1900 12:00:00 AM -> 00 6/15/2009 1:45:30 PM -> 09 |
| "yyy" | The year, with a minimum of three digits. | 1/1/0001 12:00:00 AM -> 001 1/1/0900 12:00:00 AM -> 900 1/1/1900 12:00:00 AM -> 1900 6/15/2009 1:45:30 PM -> 2009 |
| "yyyy" | The year as a four-digit number. | 1/1/0001 12:00:00 AM -> 0001 1/1/0900 12:00:00 AM -> 0900 1/1/1900 12:00:00 AM -> 1900 6/15/2009 1:45:30 PM -> 2009 |
| "yyyyy" | The year as a five-digit number. | 1/1/0001 12:00:00 AM -> 00001 6/15/2009 1:45:30 PM -> 02009 |
| "z" | Hours offset from UTC, with no leading zeros. | 6/15/2009 1:45:30 PM -07:00 -> -7 |
| "zz" | Hours offset from UTC, with a leading zero for a single-digit value. | 6/15/2009 1:45:30 PM -07:00 -> -07 |
| "zzz" | Hours and minutes offset from UTC. . | 6/15/2009 1:45:30 PM -07:00 -> -07:00 |
| ":" | The time separator. | 6/15/2009 1:45:30 PM -> : (en-US) 6/15/2009 1:45:30 PM -> . (it-IT) 6/15/2009 1:45:30 PM -> : (ja-JP) |
| "/" | The date separator. | 6/15/2009 1:45:30 PM -> / (en-US) 6/15/2009 1:45:30 PM -> - (ar-DZ) 6/15/2009 1:45:30 PM -> . (tr-TR) |
| "string" 'string' | Literal string delimiter. | 6/15/2009 1:45:30 PM ("arr:" h:m t) -> arr: 1:45 P 6/15/2009 1:45:30 PM ('arr:' h:m t) -> arr: 1:45 P |
| % | Defines the following character as a custom format specifier. | 6/15/2009 1:45:30 PM (%h) -> 1 |
| \ | The escape character. | 6/15/2009 1:45:30 PM (h \h) -> 1 h |
| Any other character | The character is copied to the result string unchanged. | 6/15/2009 1:45:30 AM (arr hh:mm t) -> arr 01:45 A |