名前 Get-Date 概要 Gets the current date and time. 構文 Get-Date [[-Date] []] [-Day []] [-DisplayHint {Date | Time | DateTime}] [-Format []] [-Hour []] [-InformationAction {SilentlyContinue | Stop | Continue | Inquire | Ignore | Suspend}] [-InformationVari able []] [-Millisecond []] [-Minute []] [-Month []] [-Second []] [-Year [ ]] [] Get-Date [[-Date] []] [-Day []] [-DisplayHint {Date | Time | DateTime}] [-Hour []] [-Informa tionAction {SilentlyContinue | Stop | Continue | Inquire | Ignore | Suspend}] [-InformationVariable [ ]] [-Millisecond []] [-Minute []] [-Month []] [-Second []] [-UFormat []] [-Year []] [] 説明 The Get-Date cmdlet gets a DateTime object that represents the current date or a date that you specify. It can forma t the date and time in several Windows and UNIX formats. You can use Get-Date to generate a date or time character s tring, and then send the string to other cmdlets or programs. パラメーター -Date [] Specifies a date and time. By default, Get-Date gets the current system date and time. Type the date in a format that is standard for the system locale, such as dd-MM-yyyy (German [Germany]) or MM/dd /yyyy (English [United States]). 必須 false 位置 1 既定値 none パイプライン入力を許可する True (ByValue, ByPropertyName) ワイルドカード文字を許可する false -Day [] Specifies the day of the month that is displayed. Enter a value from 1 to 31. The default is the current day. If you specify a value that is greater than the number of days in the month, Windows PowerShell adds the number of days to the month and displays the result. For example, "Get-Date -Month 2 -Day 31" displays "March 3", not " February 31". 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -DisplayHint [] Determines which elements of the date and time are displayed. Valid values are: -- Date: displays only the date -- Time: displays only the time -- DateTime: displays the date and time DateTime is the default. This parameter does not affect the DateTime object that Get-Date gets. 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -Format [] Displays the date and time in the Microsoft .NET Framework format indicated by the format specifier. Enter a for mat specifier. For a list of available format specifiers, see "DateTimeFormatInfo Class" in the MSDN (Microsoft Developer Network) library at http://msdn.microsoft.com/library/system.globalization.datetimeformatinfo.aspx. When you use the Format parameter, Windows PowerShell gets only the properties of the DateTime object that it ne eds to display the date in the format that you specify. As a result, some of the properties and methods of DateT ime objects might not be available. Starting in Windows PowerShell 5.0, you can use the following additional formats as values for the Format parame ter. -- FileDate - A file or path-friendly representation of the current date in local time. It is in the form of yyy ymmdd ( using 4 digits, 2 digits, and 2 digits). An example of results when you use this format is 20150302. -- FileDateUniversal - A file or path-friendly representation of the current date in universal time. It is in th e form of yyyymmdd + 'Z' (using 4 digits, 2 digits, and 2 digits). An example of results when you use this forma t is 20150302Z. -- FileDateTime - A file or path-friendly representation of the current date and time in local time, in 24-hour format. It is in the form of yyyymmdd + 'T' + hhmmssmsms, where msms is a four-character representation of milli seconds. An example of results when you use this format is 20150302T1240514987. -- FileDateTimeUniversal - A file or path-friendly representation of the current date and time in universal time , in 24-hour format. It is in the form of yyyymmdd + 'T' + hhmmssmsms, where msms is a four-character representa tion of milliseconds, + 'Z'. An example of results when you use this format is 20150302T0840539947Z. 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -Hour [] Specifies the hour that is displayed. Enter a value from 1 to 23. The default is the current hour. 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -InformationAction [] Type the date in a format that is standard for the system locale, such as dd-MM-yyyy (German [Germany]) or MM/dd /yyyy (English [United States]). 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -InformationVariable [] Type the date in a format that is standard for the system locale, such as dd-MM-yyyy (German [Germany]) or MM/dd /yyyy (English [United States]). 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -Millisecond [] Specifies the milliseconds in the date. Enter a value from 0 to 999. The default is the current number of millis econds. This parameter is introduced in Windows PowerShell 3.0. 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -Minute [] Specifies the minute that is displayed. Enter a value from 1 to 59. The default value is the current minutes. 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -Month [] Specifies the month that is displayed. Enter a value from 1 to 12. The default is the current month. 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -Second [] Specifies the second that is displayed. Enter a value from 1 to 59. The default is the current second. 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -UFormat [] Displays the date and time in UNIX format. For a list of the format specifiers, see the Notes section. When you use the UFormat parameter, Windows PowerShell gets only the properties of the DateTime object that it n eeds to display the date in the format that you specify. As a result, some of the properties and methods of Date Time objects might not be available. 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false -Year [] Specifies the year that is displayed. Enter a value from 1 to 9999. The default is the current year. 必須 false 位置 named 既定値 none パイプライン入力を許可する false ワイルドカード文字を許可する false このコマンドレットは、次の共通パラメーターをサポートします: Verbose、 Debug、ErrorAction、ErrorVariable、WarningAction、WarningVariable、 OutBuffer, PipelineVariable、および OutVariable。詳細については、 about_CommonParameters (http://go.microsoft.com/fwlink/?LinkID=113216) を参照してください。 入力 None You cannot pipe input to this cmdlet. 出力 System.DateTime or System.String When you use the Format or UFormat parameters, Get-Date returns a string. Otherwise, it returns a DateTime objec t. メモ By default, the date-time is displayed in long-date and long-time formats for the system locale. When you pipe a date to cmdlets that expect string input, such as the Add-Content cmdlet, Windows PowerShell con verts the DateTime object to a string before adding it to the file. The default ToString() format is short date and long time. To specify an alternate format, use the Format or UFormat parameters of Get-Date. Uformat Values: The following are the values of the UFormat parameter. The format for the command is: Get-Date -UFormat % For example, Get-Date -UFormat %d Date-Time: Date and time - full (default) (Friday, June 16, 2006 10:31:27 AM) c Date and time - abbreviated (Fri Jun 16 10:31:27 2006) Date: D Date in mm/dd/yy format (06/14/06) x Date in standard format for locale (09/12/07 for English-US) Year: C Century (20 for 2006) Y Year in 4-digit format (2006) y Year in 2-digit format (06) G Same as 'Y' g Same as 'y' Month: b Month name - abbreviated (Jan) B Month name - full (January) h Same as 'b' m Month number (06) Week: W Week of the year (00-52) V Week of the year (01-53) U Same as 'W' Day: a Day of the week - abbreviated name (Mon) A Day of the week - full name (Monday) u Day of the week - number (Monday = 1) d Day of the month - 2 digits (05) e Day of the month - digit preceded by a space ( 5) j Day of the year - (1-366) w Same as 'u' Time: p AM or PM r Time in 12-hour format (09:15:36 AM) R Time in 24-hour format - no seconds (17:45) T Time in 24 hour format (17:45:52) X Same as 'T' Z Time zone offset from Universal Time Coordinate (UTC) (-07) Hour: H Hour in 24-hour format (17) I Hour in 12 hour format (05) k Same as 'H' l Same as 'I' (Upper-case I = Lower-case L) Minutes & Seconds: M Minutes (35) S Seconds (05) s Seconds elapsed since January 1, 1970 00:00:00 (1150451174.95705) Special Characters: n newline character (\n) t Tab character (\t) -------------------------- EXAMPLE 1 -------------------------- PS C:\>Get-Date -DisplayHint Date Tuesday, June 13, 2006 This command gets a DateTime object, but it displays only the date. It uses the DisplayHint parameter to indicate th at only the date is to be displayed. -------------------------- EXAMPLE 2 -------------------------- PS C:\>Get-Date -Format g 6/13/2006 12:43 PM This command gets the current date and time and formats it in short-date and short-time format. It uses the .NET Fra mework "g" format specifier (General [short date and short time]) to specify the format. -------------------------- EXAMPLE 3 -------------------------- PS C:\>Get-Date -UFormat "%Y / %m / %d / %A / %Z" 2006 / 06 / 13 / Tuesday / -07 This command gets the current date and time and formats it as specified by the command. In this case, the format inc ludes the full year (%Y), the two-digit numeric month (%m), the date (%d), the full day of the week (%A), and the of fset from UTC ("Zulu"). -------------------------- EXAMPLE 4 -------------------------- PS C:\>(Get-Date -Year 2000 -Month 12 -Day 31).DayOfYear 366 This command displays the day of the year for the current date. For example, December 31 is the 365th day of 2006, b ut it is the 366th day of 2000. -------------------------- EXAMPLE 5 -------------------------- PS C:\>$a = Get-Date PS C:\>$a.IsDaylightSavingTime() True These commands tell you whether the current date and time are adjusted for daylight savings time in the current loca le. The first command creates a variable named $a and then assigns the object retrieved by Get-Date to the $a variable. Then, it uses the IsDaylightSavingTime method on the object in $a. To see the properties and methods of the DateTime object, type: "Get-Date | get-member". -------------------------- EXAMPLE 6 -------------------------- PS C:\>$a = Get-Date PS C:\>$a.ToUniversalTime() Tuesday, June 13, 2006 8:09:19 PM These commands convert the current date and time to UTC time. The first command creates a variable named $a and then assigns the object retrieved by Get-Date to the $a variable. Then, it uses the ToUniversalTime method on the object in $a. -------------------------- EXAMPLE 7 -------------------------- PS C:\>$a = Get-WmiObject Win32_Bios -Computer Server01 PS C:\>$a | Format-List -Property Name, @{Label="BIOS Age";Expression={(Get-Date) - $_.ConvertToDateTime($_.ReleaseD ate)}} Name : Default System BIOS BIOS Age : 1345.17:31:07.1091047 Windows Management Instrumentation (WMI) uses a different date-time object than the .NET Framework date-time object that Get-Date returns. To use date-time information from WMI in a command with date-time information from Get-Date, you have to use the ConvertToDateTime method to convert WMI CIM_DATETIME objects to .NET Framework DateTime objects. The commands in this example display the name and age of the BIOS on a remote computer, Server01. The first command uses the Get-WmiObject cmdlet to get an instance of the Win32_BIOS class on Server01 and then stor es it in the $a variable. The second command uses the pipeline operator (|) to send the WMI object stored in $a to the Format-List cmdlet. The Property parameter of Format-List specifies two properties to display in the list, "Name" and "BIOS Age". The "BIOS Age" property is specified in a hash table. The table includes the Label key, which specifies the name of the prope rty, and the Expression key, which contains the expression that calculates the BIOS age. The expression uses the Con vertToDateTime method to convert each instance of ReleaseDate to a .NET Framework DateTime object. Then, the value i s subtracted from the value of the Get-Date cmdlet, which, without parameters, gets the current date. The backtick character (`) is the line continuation character in Windows PowerShell. -------------------------- EXAMPLE 8 -------------------------- PS C:\>Get-Date Tuesday, June 13, 2006 12:43:42 PM This command gets a DateTime object and displays the current date and time in the long date and long time formats fo r the system locale, as though you typed "Get-Date -Format F". -------------------------- EXAMPLE 9 -------------------------- PS C:\>Get-Date Tuesday, September 26, 2006 11:25:31 AM PS C:\>(Get-Date).ToString() 9/26/2006 11:25:31 AM PS C:\>Get-Date | Add-Content Test.txt # Adds 9/26/2006 11:25:31 AM PS C:\>Get-Date -Format F | Add-Content Test.txt # Adds Tuesday, September 26, 2006 11:25:31 AM These commands demonstrate how to use Get-Date with Add-Content and other cmdlets that convert the DateTime object t hat Get-Date generates to a string. The first command shows that the default display from a "Get-Date" command is in long-date and long-time format. The second command shows that the default display from the ToString() method of the DateTime object is in short-date and short-time format. The third command uses a pipeline operator to send the DateTime object to the Add-Content cmdlet, which adds the con tent to the Test.txt file. Because Add-Content uses the ToString() method of the DateTime object, the date that is a dded is in short-date and short-time format. The fourth command uses the Format parameter of Get-Date to specify the format. When you use the Format or UFormat p arameters, Get-Date generates a string, not a DateTime object. Then, when you send the string to Add-Content, it add s the string to the Test.txt file without changing it. -------------------------- EXAMPLE 10 -------------------------- The first command uses the Format parameter with a value of "o" to generate a timestamp string. PS C:\>Get-Date -Format o 2012-03-08T10:55:55.6083839-08:00 The second command prepares the timestamp to be used in a directory name. The command replaces the colon characters (:) in the string with dots (.) and saves the result in the $timestamp variable. Replacing the colons prevents the c haracters that precede each colon from being interpreted as a drive name. PS C:\>$timestamp = Get-Date -Format o | foreach {$_ -replace ":", "."} The third command uses the Mkdir function to create a directory with the name in the $timestamp variable. PS C:\>mkdir C:\ps-test\$timestamp Directory: C:\ps-test Mode LastWriteTime Length Name ---- ------------- ------ ---- d---- 3/8/2012 11:01 AM 2012-03-08T11.00.24.4192623-08.00 This example shows how to use the Get-Date cmdlet to create a timestamp and how to use the timestamp in or as part o f a directory name. 関連するリンク Online Version: http://go.microsoft.com/fwlink/p/?linkid=293966 New-TimeSpan Set-Date