[Cialug] Calculating dates relative to today

[kristau]

Just discovered this nifty command-line hack to calculate dates relative to
today instead of using some random date-calculating website or counting
squares on an old fashioned wall-hanger:

touch -d 'X day' test; stat test

Examples:

*90 days from today?*
kristau at pop-thelio:~$ touch -d '90 day' test; stat test
  File: test
  Size: 0               Blocks: 0          IO Block: 4096   regular empty
file
Device: fc01h/64513d    Inode: 46138998    Links: 1
Access: (0664/-rw-rw-r--)  Uid: ( 1000/ kristau)   Gid: ( 1000/ kristau)

*Access: 2024-05-30 13:30:47.677889558 -0500Modify: 2024-05-30
13:30:47.677889558 -0500*
Change: 2024-03-01 12:30:47.677657453 -0600
 Birth: 2024-03-01 12:30:25.265369754 -0600

*90 days ago?*
kristau at pop-thelio:~$ touch -d '-90 day' test; stat test
  File: test
  Size: 0               Blocks: 0          IO Block: 4096   regular empty
file
Device: fc01h/64513d    Inode: 46138998    Links: 1
Access: (0664/-rw-rw-r--)  Uid: ( 1000/ kristau)   Gid: ( 1000/ kristau)

*Access: 2023-12-02 12:32:53.049962148 -0600Modify: 2023-12-02
12:32:53.049962148 -0600*
Change: 2024-03-01 12:32:53.047266778 -0600
 Birth: 2024-03-01 12:30:25.265369754 -0600

Might not be new to you, but it was new to me so I thought I'd share!
-- 
Tired programmer
Coding late into the night
The core dump follows