How to Add Expiry Date in Photoshop Script ??

Are you talking about ESTK or UXP Scripts? 

I have tried many times to create some expiration date script, The only problem I've encountered is that once the date has expired, if you put an earlier date on the PC, it continues to work normally. Unfortunately, if you want to make it work you need a database on the internet and to date I have not been able to do so.