Get-date AddDays Method Not Returning a Value

Copper Contributor

I have an unusual one. The AddDays method of Get-Date isn't returning a value on my computer. It's not working in PowerShell 5 or 7. Get-date by itself works find and returns today's date.



PS C:\Users\Me> get-date

Thursday, September 28, 2023 3:39:06 PM

PS C:\Users\Me> (get-date).AddDays.(-30)
PS C:\Users\Me>




Oddly, it works fine from an elevated window (using a separate admin account).



PS C:\Scripts> get-date

Thursday, September 28, 2023 3:41:36 PM

PS C:\Scripts> (get-date).AddDays(-30)

Tuesday, August 29, 2023 3:41:49 PM

PS C:\Scripts>




It seems like a profile issue, so I deleted my PS profile and created a new one, but it's the same thing.


Anyone seen something like this before?


8 Replies
No, but does (Get-date).AddDays(-30).ToString('dd-MM-yyyy') work?
Ok this is wild. It wasn't returning a value. I tried your suggestion, and now it seems to be working fine?

PowerShell 7.3.7
PS C:\Users\me> (get-date).AddDays.(-30)
PS C:\Users\me> (get-date)

Thursday, September 28, 2023 4:05:39 PM

PS C:\Users\me> (Get-date).AddDays(-30).ToString('dd-MM-yyyy')
PS C:\Users\me> (get-date).AddDays(10)

Sunday, October 8, 2023 4:18:14 PM

PS C:\Users\me> (get-date).AddDays(-10)

Monday, September 18, 2023 4:18:19 PM

PS C:\Users\me> (get-date).AddDays(-30)

Tuesday, August 29, 2023 4:18:23 PM

PS C:\Users\me>
That is odd... Language/Culture setting, not sure why it's working now.. Even after opening another session?
Yep, even rebooted, it's working fine now.
Good to hear, please mark my answer as solution to mark it as solved
best response confirmed by tehatchKFI (Copper Contributor)



In line six of your original post, you have made a small syntax mistake, which is why it returns nothing.


From line 6, this:




Should have been this (note the removal of the period prior to the "(-30)"):






Ah! It was related to another part of a script, makes sense now :grinning_face_with_sweat:
Doh! Good catch.