Thanks @NaseerAhmad. Regarding your response in the other thread, where you suggested to copy the selected day/week/... to "next day or day +1, next week or week +1": I would prefer not having to display another dialog where the user needs to choose to what day/week the data should be duplicated to, so I am trying to find the best default.
Would it be important for you that it duplicates it to the NEXT day/week or would it be sufficient if it duplicates it to the CURRENT day/week? I could imagine, that for most users, the latter would be more appropriate. Would this also work for you? Or do you duplicate days/weeks in advance (e.g. duplicating the current day to tomorrows day)?