Opening on-screen touch keyboard for entering text.
In any AnCal window, you can open alternative on-screen keyboard to enter text by touch. Simply touch and hold edit field (blue arrow mark will be visible), then slide to right for about 1/3 of field width and release.
Quick adding new appointment with easy selected date and time.
In a Day view, touch selected hour text area on the left side of the list and hold. Horizontal slider will appear. If you slide to the right, minutes of selected hour will change in fully hour range. When touch will be released, New appointment screen will be opened with already selected date and time.