| Name | Description | |
|---|---|---|
  | CalculateEaster | Calculates the date of Easter for a given year. |
| Combine | Combines two DateTime values, using the date from one value and the time from the other. |
| CompareDateTime | Overloaded. Compares two nullable DateTime values |
| CompareTime | Compares only the time portion of two DateTime values (hour and minute only; milliseconds are ignored). |
| ConvertTimeZone | Overloaded. Converts a DateTime from one time zone to another |
| CurrentTZBias | Gets the current time zone bias (offset from UTC) |
| DayOfWeek | Returns an integer corresponding to the day of the week for the specified date, with Sunday=1, Monday=2, ..., Saturday=7 |
| DescribeDateRange | Provides a readable description of a date range |
| EndOfDay | Returns a DateTime value representing 11:59:59 PM on the source day. |
| FirstDayOfMonth | Returns a DateTime value representing the first day of the month that includes the source date. |
| FirstDayOfYear | Gets a DateTime representing January 1 of the year of a specified date. |
| FirstWeekdayOfMonth | Returns an integer indicating what day is the first day of the month in which the specified date occurs (Sunday=1...Saturday=7). |
| FormatSeconds | Formats a number of seconds into a more readable format. |
| FormatTimespan | Formats a timespan into a readable format. |
| IsEndOfDay | Determines whether the time portion of a DateTime is 11:59pm (seconds ignored) |
| IsLastDayOfMonth | Determines whether a date value is the last day of the month. |
| IsLastOccurrenceInMonth | Indicates whether a date is the last occurrence of a given weekday in the month. For example, if the value is a Monday, this method returns True if the date is the last Monday of the month, or False if there are other Mondays after it. |
| IsStartOfDay | Determines whether the time portion of a DateTime is 12:00am (seconds ignored) |
| LastDayOfMonth | Overloaded. Returns a DateTime representing the last day of the month in which the specified date occurs. |
| NextMinute | Overloaded. Gets a DateTime representing the start of the next minute |
| OccurrenceInMonth | Indicates what occurrence of a given day of the week the specified date represents. For example, if the value is a Monday, this method determines whether it is the first, second, third, fourth, or fifth Monday of the month. |
| RemoveSeconds | Overloaded. Returns a new DateTime value identical to the source but with seconds and milliseconds set to 0. |
| RepresentsFullYear | Indicates whether the specified pair of dates is January 1 to December 31 of the same year. |
| ShortDateTime | Returns the date and time in the short format for the locale |
| StartOfDay | Returns a DateTime value representing 12:00:00 AM on the source day. |
| TimeString | Returns the time portion of the specified value, in short time format. |
| TimeValue | Overloaded. Returns a DateTime representing the time portion only for the specified hour and minute |
| WeekOfMonth | Indicates what week of the month a value falls in. |
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