Datetime Variables as Cyclical Features

[HariWu1995]

• As a loyal user of Featuretools, I appreciate your work very much. However, in some of my projects relating to Datetime, I usually have to encode cyclical features, such as day-of-week, day-of-month, month, etc.
• I check your code that for now, they are Ordinal, which are correct but undifferent from other ordinal variables. When I customize Transform Primitives for these Cyclical Features, it's exhausting to apply only to them and not to others.
• My expectation is when to run DFS, the first iteration will return Day, Week, Month from Datetime (like current code). But in next iteration, another Sin(Day), Cos(Day), etc. will be calculated with customized primitives Sin / Cos applied to DatetimeCyclical (or other name).