Dates not working

[Amparose]

Various date properties are just pushing the current date/time instead of the relevant date/time. I have this in my template:

Last Highlight: {{date ZANNOTATIONMODIFICATIONDATE "YYYY/MM/DDTHH:mm:ss "}}
Date Finished: {{date ZDATEFINISHED "YYYY/MM/DDTHH:mm:ss" }}

Both don't work. Also, I tried on a book that isn't finished and it still puts in the current date/time.