Thank you Amit
First problem solved,
Now the mission is to get it to look pretty.
May be you can come up with icons for each event type like below and see event names as tool tips. With Lengthy descriptions you are likely to reduce readability.
This would reduce clutter on calendar.
You can remove multiple marks labels by right click --> Mark Label --> Never show
Please find the attached workbook for your reference.
Overall it would take good amount of efforts with this approach.
Calendar.twbx 273.9 KB