Hi Bibletruther, there are many Auto Keyboard programs around that you can use on you computer and smartphone.
I use an Apple MAC, iPhone & iPad and combine this with a program called TextExpander.
I have setup a keyboard shortcut in TextExpander to enter a date only or a date/time stamp.
There are many other keyboard Auto Keyboard programs available for M$, Apple, Android, Linux, Chrome, etc.....
Hope this helps.