...
C = Current
D = Day
W = Week
M = Month
Q = Quarter
Y = Year
CD = Current Day
CW = Current week
CM = Current month
10D = 10 days from today (e.g. 10th date of every month)
2W = 2 weeks from today
D10 = The next 10th day of a month
WD4 = The next 4th day of a week (Thursday)
...