Setup AutoEvent and Get Schedule from database

Hello,
I'm developing a silkroad online server, and i got a problem about setup auto event.

And i have a question that is: in table _Schedule(SRO_SHARD database)
http://image.prntscr.com/image/c9c04...13f58b8203.png

there is a column name MainInterval_Type (as i check it has three values: 1 3 and 4), i don't know that 1 is alias for what?
I think 1: daily event,3 weekly event, and 4: twice a week event,
but when i recheck some rows it looks like doesn't right!, Can u give me some information about this column.
Generally, i want to select info about server event like this page show up: Vengard-Online | Orignal System With Some Edits |old School | Free to Play, do u know how can show up server event like this. (sql server query)
thanks for helping.