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Fun With PowerShell String Formatting

This command returns a DateTime object that displays the current date or a custom date. Get-Date supports a variety of UNIX and .NET date and time formats. It can generate a date or time character string, which can then be sent to other programs or commands. Now that you are aware of the basic methods of using dates, it’s time to delve deeper into the topic.

  • Now if I convert my date ranges into days of the year then I can match the day of the year I was born against the ranges of days for star signs.
  • We can use the plus sign to add days (+) to a date or minus (-) to subtract them.
  • PowerShell also has the ability to display values in a percentage format.
  • I’m simply taking a number, formatting it with commas and making it eight spaces wide.
  • After explaining a little I’ll complete Computus in PowerShell.

If I wanted to get crazy I guess I could even use arrays for more variables, like the month day and year values reducing some lines there. I could also put the years, months and days into an array as well, to cut a few more lines. But it does the job that was asked for pretty well, so challenge is over and I should get back to work. We can use the plus sign to add days (+) to a date or minus (-) to subtract them. We can also convert the Datetime format that get-date creates to just a date with Month, Day and Year. The Get-Date cmdlet is a lightweight command used in PowerShell.

Date arithmetic with PowerShell

Let’s play around a bit more by using different formats to display dates. If you check the type of object Get-Date returns, you’ll notice it’s a System.DateTime object type. This class is what exposes all of the different properties and methods you see. You can discover it’s object type by using Get-Member or using the GetType() as shown below.

powershell date math

You’ll see as soon as you use the Format parameter, Get-Date no longer returns a DateTime object but now strings a string. Use the New-TimeSpan cmdlet by providing a Start and End date/time Securing Connections with the SSL It! Extension Plesk Obsidian documentation as parameters. For example, if you’d like to find the difference between November 23rd, 2020 at midnight to December 31st, 2020 at midnight, you could use the following code snippet.

Calculate Correct Date Difference (elapsed Y, M, D) in PowerShell

The last command will display the value of the variable $c as 2.5. The last command will display the value of the variable $y as a single string “ShellShell”. The last command will display the value of the variable $c as 200. The last command will display the value of the variable $c as -10. The last command will display the value of the variable $c as 10.

To use them, you need to prepend strict_ to the name of the date format, for instance strict_date_optional_time instead of date_optional_time. We pretty much all just look up on a calendar or Google what day Easter will be each year. Computus, Latin for ‘computation’, is the calculation that determines the calendar date of Easter. After explaining a little I’ll complete Computus in PowerShell. The subtraction operator is an arithmetic operator, which is used to subtract one numeric value from another numeric value and make a number to a negative number. Any code longer than three lines should be added as code using the ‘Select Code’ dropdown menu or attached as a file.

It’s still a lot of code for $Profile, but I do like it & can simply call it from $Profile to keep that file clean. I just don’t have time to look at it now if the OP or someone else doesn’t fix my logic and adds the tests I’ll see if I can do it later tonight, thought I can’t guarantee that. Plus my method doesn’t need any fractions and uses less math to get at a more accurate answer for your needs with no rounding.

  • I’m a student just getting started to learn Powershell basics and would love to see how it works.
  • The (Get-Date) will get the current date, but create a date object from it.
  • A great little type of post that would highlight your blog.
  • The latter parameter uses the Unix formatting syntax whereas the former uses .NET formatting syntax.

To run a snippet of code highlight the lines you want to execute, then in VSCode press F8 or in the IDE F5. You can display the contents of an array variable by highlighting it and using F8/F5. For all of the examples, we’ll display the code, then under it the result of our code. In this article I’ll be using PowerShell Core, 7.1.3, and VSCode. The examples should work in PowerShell 5.1 in the PowerShell IDE, although they’ve not been tested there. Instead of using the Select-Object commandlet you can also use the parenthesis () and grab just the value your looking for from Get-Date.

What’s the Current Day Number?

You can call each of these methods to find a date/time in the future or in the past. Below you’ll see a few examples of invoking each of these methods and their output. It’s possible to create a formatted value, then assign that to a variable. Let’s take a look at this slightly more complex example. Note each one is on it’s own line, WordPress is wrapping the -f part to the next line for space reasons.

powershell date math

We have shown you various formats for getting the current date in PowerShell. Moreover, different customization methods are also provided in this article. How many times have you had to figure out what date was X days, months, or years ago, or perhaps what time was Y minutes, hours, or seconds ago? Producing a report of all the users who have not logged in during the past 90 days is a pretty common request. It’s very easy to calculate date and time math with Windows PowerShell.

Stay with date objects until you need to do otherwise … And even then, try to only use data strings for display. Is there any method to get the current date in PowerShell? You will be amazed to know that answer to this An Intro to Git and GitHub for Beginners Tutorial question is simple than the question itself seems. PowerShell utilizes a Get-Date cmdlet to get the current date of your local system. This command is also used for formatting outputs that involve date and time.

Multiplication Operator (*)

The last command will display the value of the variable $z as a single string “PowerShell”. The last command will display the value of the variable $c as 30. The addition operator is an arithmetic operator, which is used to add the two numbers, strings, arrays, and hash tables. Second, I had no idea this would require such impressive amounts of code! I would recommend using the time span as is without any additional division / modifications as it gives you a fairly accurate representation of the the duration between both. Powershell is unfortunately notoriously bad at type conversions and simple math.

  • The paschal or Easter-month is the first one in the year to have its fourteenth day, it’s full moon, on or after March 21st.
  • Using the New-Timespan CmdletThe New-TimeSpan cmdlet provides a way to do date arithmetic within Windows PowerShell.
  • After that, it will call the “IsDayLightSavingTime()” boolean function.
  • Adam is a Microsoft Windows PowerShell MVP, 2015 powershell.org PowerShell hero and has numerous Microsoft IT pro certifications.
  • In the below code example we demonstrate an example using both.

Aside from factoring in partial leap years it’s pretty solid. I have commented a section that would begin the process to factor in https://topbitcoinnews.org/ partial leap years but haven’t done anything on that front. Having said that, the code is rather functional and pretty neat…

The ulterior motive of sharing this with you is to illustrate how easy it is to put things you’re learning into scripts & work on them interactively. For days in the past, make $Days negative and change the Hours, Minutes and Seconds to 0. I’m a student just getting started to learn Powershell basics and would love to see how it works. Well I had another breakthrough on the algorithm not a huge one but eliminated a second while loop, plus i took some of the thoughts form my previous post and applied them. Ugh I am so close I’m going to have to finish my script, but I have a loop in the month calculation at the moment ugh. I can finish those minor points, so THANK YOU for this.

The UFormat Parameter

Parse attempts to create a DateTime object out of a given string using common formats. What if the string you are passing in doesn’t fit any known format? You can use ParseExact to do so by giving a date and time template to follow. Now if I convert my date ranges into days of the year then I can match the day of the year I was born against the ranges of days for star signs.

Sometimes I just need to get the current date or sometimes I need today’s date and the ability to grab things like the week, month, day or time from it. The result is a very human readable result along with the name of the Month and Day too. Many APIs which support date values also support date mathexpressions, such as now-1m/d— the current time, minus one month, rounded down to the nearest day. This will leave a number of days until your next birthday. The ‘if’ statement is added if your birthday has already happened at the time of the code, it simply reverses the sum to give a positive number. The next two, months and days required a tweak to the algorithm.

I’m using the ‘Truncate’ property as I don’t want to do anything fancy like round up my numbers. Adding the .typename of Days to my $diff variable and dividing by $daysInYear variable I can get my age in years. The last command will display the value of the variable $c as 2.

I think the Commandlet is doing the “leap year” work for us in that we asked to add a Month to the date given so it did exactly that. I purposely used the Jan. 30th date because it is a leap year. I am casting the string date to a Datetime which is also setting the date to a default of midnight. These strict date formats are especially useful whendate fields are dynamically mapped in order to make sure to not accidentally map irrelevant strings as dates.

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