Last night I found out that each time you saved your document while working in Krita, the original date/time stamp for the file you’re working on will be override. Other softwares keep the original stamp. This is good if you’re the kind of person that likes to keep track of your progress and like to go back in time to discuss certain things. I cropped a few files to clear the empty space and the original stamp got replaced with the new stamp. My only way around this at the moment is to rename the bottom layer of a new document and input the date/time into its layer title.