Thank you for the complete response.
I still have a concern anyway. You say I have to set EventRasterizer=FONT.
That's what I did, but then I set the EventFontColor=0000ff for example.
Then all my event days are blue. What if I want some in blue and some other in green?

You can use Profile to change what you want.
example:
Set one event as "Work" and at [Profile] session add following:
[Profile N] <-- 'N' is a number
Name=Work
- - -
EventFontColor=00FF00 <-- this is what you want(set EventDate font color)

That's exactly what I did, and that's my problem...
EventFontColor seems to override profile colors.

Here is my "Event" settings:

[Event]
EventEnable=1
EventBitmapName=
EventlistBitmapName=
EventAlign=18
EventNumOfComponents=
EventSeparation=0
EventRasterizer=FONT
EventFont=12/0/0/0/700/0/0/0/0/3/2/1/34/Calibri
EventFontColor=0000ff
EventInCalendar=0
EventFont2=11/0/0/0/700/0/0/0/0/3/2/1/34/Calibri
EventFontColor2=0000ff
EventIconEnable=1

And here is my "Profile 1" settings:

[Profile 1]
Name=Business
EventFontColor=ff0000

According to this normal events should be blue and Business events should be red. Instead, they're all blue
(Of course I chose for my event in the calendar the "Business" category so I have a right idea of what happens)

Here is my .ini file so it will be easier... Maybe the error is elsewhere...

I copy your code to test, it's working well.

But, you have some thing wrong:
the color code is use: color=XX(blue)XX(green)XX(red)
So, according to your code normal events will be red and Business events will be blue.
Suggest you set more other date to test.

I have not change your code, so you can see(image):
25 is Business event and 30 is default event.

Well I'm really confused...
I tried creating 7 different profiles and event days always appear in red >_<
Don't get what's wrong.

I added the zip file with all files the skin uses... Maybe something in another file is wrong?

Or maybe is there an option, a box to check in Rainlendar options??
I'm really lost now