Get-date AddDays Method Not Returning a Value

[tehatchKFI]

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?

[#2]

No, but does (Get-date).AddDays(-30).ToString('dd-MM-yyyy') work?

[#3]

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')
29-08-2023
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>

[#4]

That is odd... Language/Culture setting, not sure why it's working now.. Even after opening another session?

[#5]

Yep, even rebooted, it's working fine now.

[#6]

Good to hear, please mark my answer as solution to mark it as solved

[#7 · Accepted solution]

@tehatchKFI 

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

From line 6, this:

(get-date).AddDays.(-30)

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

(get-date).AddDays(-30)

Cheers,

Lain

[#8]

Ah! It was related to another part of a script, makes sense now 😅

[#9]

Doh! Good catch.