The user is able to lock the working times of the selected day when copying/repeating over a certain time range.

This day will then be excluded from any automatic working time replacements, however, it can still be modified manually.

E.g.: A staff member is usually working from 08:00 AM to 16:00 PM so his working times are copied from 01.01.2016 until 31.12.2016.

On the 14.09.2016, he is busy in the morning and will work on this day from 10:00 AM to 18:00 PM which will be entered in the scheduler. As this is an extraordinary working time, it will be locked.
On the 01.07.2016, his task field changes and now he has to work from 07:30 AM to 15:30 PM. The working time of this day will again be copied until the 31.12.2016. The extraordinary working time on the 14.09.2016 will be unaffected by the new working times.