Preferences: Dates
Enter dates via: Lets you choose whether to enter dates via a dialog box in which you type the date, or by picking the date from a calendar. If you pick the dialog option, you can use the calendar to enter dates in the dialog. Dates entered in dialogs must conform to the "short date" format in your Mac's System Preferences in order to be considered valid.

Skip weekends in date dialog: When you change the date in the Daily Log panel, TimeCache automatically prompts you with the next day's date. If you turn on this Skip Weekends feature, TimeCache skips Saturdays and Sundays for the date it automatically enters. You can still enter any date manually. This applies to dates entered via the dialog or calendar.