Hi Sergey,
How about already existing shortcuts?
CONTROL + (=) for tomorrow
CONTROL + (-) for previous day
CONTROL + ALT + (=) for next week
CONTROL + ALT + (-) for previous week
[With all the above keep tapping =/- keys to keep adding/reducing]
ALT + d, ENTER for today
ALT + d, d, ENTER for next day
ALT + d, w, ENTER for next week
ALT + d, m, ENTER for next month