As an administrator you can enter working time records manually. For this you go to “Reports” (marker 1), Working Time (marker 2) and click on “Add time”.
After choosing the employee (user) select the desired working time type (Marker 1) and create a note (Marker 2) for this working time entry. You can edit the date, Start and End time (Marker 3) as you wish, the duration (Marker 5) will be automatically adjusted. Enter a break (Marker 4) and press "Save" (Marker 6).
You can enter the time format and duration in almost any form, you will find all the related details in the article about adding time and duration.
If you want to add working time manually for yourself that's possible in the Recording menu.