DatePart Function
Description
Returns a Variant (Integer) containing the specified part of a given date.
Syntax
DatePart(interval, date[,firstdayofweek[, firstweekofyear]])
The DatePart function syntax has these named arguments
| Part | Description |
|
| interval | Required. String expression that is the interval of time you want to return. |
| date | Required. Variant (Date) value that you want to evaluate. |
| firstdayofweek | Optional. A constant that specifies the first day of the week. If not specified, Sunday is assumed. |
| firstweekofyear | Optional. A constant that specifies the first week of the year. If not specified, the first week is assumed to be the week in which January 1 occurs. |
Settings
The interval argument has these settings
| Setting | Description |
|
| yyyy | Year |
| q | Quarter |
| m | Month |
| y | Day of year |
| d | Day |
| w | Weekday |
| ww | Week |
| h | Hour |
| n | Minute |
| s | Second |
The firstdayofweek argument has these settings
| Constant | Value | Description |
| |
| vbUseSystem | 0 | Use the NLS API setting. |
| vbSunday | 1 | Sunday (default) |
| vbMonday | 2 | Monday |
| vbTuesday | 3 | Tuesday |
| vbWednesday | 4 | Wednesday |
| vbThursday | 5 | Thursday |
| vbFriday | 6 | Friday |
| vbSaturday | 7 | Saturday |
The firstweekofyear argument has these settings
| Constant | Value | Description |
| |
| vbUseSystem | 0 | Use the NLS API setting. |
| vbFirstJan1 | 1 | Start with week in which January 1 occurs (default). |
| vbFirstFourDays | 2 | Start with the first week that has at least four days in the new year. |
| vbFirstFullWeek | 3 | Start with first full week of the year. |
Remarks
You can use the DatePart function to evaluate a date and return a specific interval of time. For example, you might use DatePart to calculate the day of the week or the current hour.
The firstdayofweek argument affects calculations that use the "w" and "ww" interval symbols.
If date is a date literal, the specified year becomes a permanent part of that date. However, if date is enclosed in double quotation marks (" "), and you omit the year, the current year is inserted in your code each time the date expression is evaluated. This makes it possible to write code that can be used in different years.
See Also
DateAdd function, DateDiff function, Day function, Format function, Now function, Weekday function, Year function.
Example
This example takes a date and, using the DatePart function, displays the quarter of the year in which it occurs.
Dim TheDate As Date ' Declare variables.
Dim Msg
TheDate = InputBox("Enter a date:")
Msg = "Quarter: " & DatePart("q", TheDate)
MsgBox Msg
Example (Microsoft Access)
The following example uses the DatePart function to specify criteria for a select query. For example, suppose you want to create a query based on an Orders table to list all orders placed in the first quarter of 1996. Assuming your Orders table has a OrderID field and an OrderDate field, you can drag the OrderID field to the first cell in the query design grid, and enter the following in the Criteria cell beneath it.
(DatePart("q", [OrderDate]) = 1) and (DatePart("yyyy", [OrderDate]) = 1996)