I use the Windows 24 hour clock. I need to record time rounded to ten minutes. When I add a tag Start time displays as for example 08:22:33 and End time as 09:41:00 (HH:MM:ss, the long time format). I do not need the seconds so the short date format (HH:mm) would have been fine but that option is not available. What is worse: when start/end time must be changed the colon button may have to be used four times to make amendments; you cannot use the decimal key to distinguish between minutes and seconds. That is very awkward if you make changes with the numeric keypad. In that case to change the start time to say 08:10:00 you will have to remove [:22:33] and type [colon key on keyboard] [10 on numeric keypad] [colon key on keyboard] [00 on numeric keypad]. It would be a lot easier if you could have typed [decimal on numeric keypad] [10 on numeric keypad] [decimal on numeric keypad] [00 on numeric keypad]. It would have been even easier if you could have selected by default to use the short date format; the changes would then have been [decimal on numeric keypad] [10 on numeric keypad]. This technique is used for example in MS Outlook Calendar and Cicero International Law pack.