Changing a File's Time Attribute

Is there a way to change only the time of a file's creation/modification date/time?

The date and time are not two distinct attributes fields or values – just one quantity of seconds since an epoch date (the opening moment of 1970), which the stringifications present in terms of a date and time combination, for readability.

What you need to do is just calculate the new moment that you require, and then restamp the file.

See, for example:

[Unix time - Wikipedia](

and in

man touch

for documentation of the touch command

and this thread for previous discussion:

Problem - How to change creation and modification date of selected files?

Not Directly.

As @ComplexPoint has stated, files/folders only have date/time properties as one unit.

Also, while we can easily get the file time using native KM Actions, I don't see any way to set the time without using a script.

So, this is a bit complicated because we must first separate date only and time, and then recombine with the new time. So, I have used a couple of AppleScripts to do this.

Below is just an example written in response to your request. You will need to use as an example and/or change to meet your workflow automation needs.

Please let us know if it meets your needs.


Example Output

You are prompted with the current Created Date/Time, and then you can change the time (and date) as desired.


MACRO:   Set TIME to User Provided Value for Finder Selection [Example]

-~~~ VER: 1.0    2020-11-24 ~~~
Requires: KM 8.2.4+   macOS 10.11 (El Capitan)+
(Macro was written & tested using KM 9.0+ on macOS 10.14.5 (Mojave))

DOWNLOAD Macro File:

Set TIME to User Provided Value for Finder Selection [Example].kmmacros
Note: This Macro was uploaded in a DISABLED state. You must enable before it can be triggered.




  • Set the Creation and/or Modification Date of Item in Finder Selection


  1. Select the Item in the Finder
  2. Run this macro

TAGS: @Dates, @Finder, @Files, @ASObjC, @ShaneStanley

• To facilitate the reading, customizing, and maintenance of this macro,
key Actions are colored as follows:
• GREEN -- Key Comments designed to highlight main sections of macro
• MAGENTA -- Actions designed to be customized by user
• YELLOW -- Primary Actions (usually the main purpose of the macro)
• ORANGE -- Actions that permanently destroy Varibles or Clipboards


  1. Keyboard Maestro Ver 9+
  2. macOS Sierra+

This works exactly as I need it to.

Many many thanks!

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