Create a custom dynamic stamp using Acrobat DC

In Acrobat, go to Tools > Stamp

The Stamp window is displayed.

Click Custom Stamps > Create

Click Browse to create a stamp image from any of the file types listed in the Open dialog and Click OK.

Note: All file types are converted to PDF.

In the Create Custom Stamp dialog, select the Dynamic category. Name the stamp and click OK.

Open the newly created PDF stamp file from the following location of your system user directory. The file is arbitrarily named.

• Windows 7/ 10: C:\Users\[user name]\AppData\Roaming\Adobe\Acrobat\DC\Stamps
• Mac OS: /Users/[user name]/Library/Application Support/Adobe/Acrobat/DC/Stamps

Go to Tools > Prepare Form.
Make sure, the newly created PDF stamp file (in step 5) is selected. Click Start.

In the Prepare Form toolbar, click Add a Text Field. Place and name the field where you want the date to appear.

Double-click the text field or click All Properties and select the Calculate tab.

Choose the Custom Calculation Script: radio button and click Edit. The JavaScript Editor window is displayed.

In the JavaScript Editor, type the following script and click OK.

Close the Text Field Properties dialog, close Prepare Form mode, and Save the file.
Rename the stamp file for easy reference.

The dynamic stamp is ready. To use the dynamic stamp on multiple computers, copy the file to the following program directory.

• Windows 7/ 10: [install_directory]\Adobe\Acrobat DC\Acrobat\plug_ins\Annotations\Stamps\[language _directory]\
  
  For example, C:\Program Files (x86)\Adobe\Acrobat DC\Acrobat\plug_ins\Annotations\Stamps\ENU\
  
  
• Mac OS: /Applications/Adobe Acrobat DC/Adobe Acrobat Pro.app/Contents/Built-In/Comments.acroplugin/Stamps/[language _directory]/