Dynamic Stamps - Done easy - Acrobat DC

1. Tools ---> Create PDF ---> Blank Page

2. Tools ---> Edit ---> Crop pages (down to the size you want for the stamp

      2a. You can insert a picture if you want (not what I did)

3. Tools ---> Prepare Form ---> Save file (doesn't matter where) ---> Create Text Box

a. Read Only

b. Text size: Auto

c. change background / text color if you want

d. Calculation ---> Custom Script ---- Edit :    

event.value = ("No Answer: " + util.printd("h:MM tt mmm dd", new Date()));

e. Change the script as you need. The above would look like:    No Answer: 9:05 AM Wed Jan 25

4. Save file in the folder: C:\Users\<your username>\AppData\Roaming\Adobe\Acrobat\Stamps

5. You can go back to the original file (step 3), and change the script to make new words, e.g. instead of No Answer, change to Voicemail, etc.

I like this way, because through step 5, you can create a new dynamic stamp every minute.