Please check https://phabricator.kde.org/D22266 that is already a dataset for calendar activities.
Note that it may need rebasing with latest commits on the branch but it should work fine if you apply the diff from commit 57985fcaf8191860eca

@echarruau I would like to add one level of each modes to currently implemented multiple_dataset.

@jjazeix @echarruau I have added a new level selection to Data/1.qml as to find date present in any month. I have also fixed some other issues as the levels can be changed while viewing the tutorial and identation issues. Shall I update the diff https://phabricator.kde.org/D22266 or create a new diff as creating a new diff would create a lot of files to be uploaded?
Thanks:)

@dekumar sorry, I didn't see the last reply. Please update the existing diff instead of creating a new one.

@jjazeix It's ok no problem. I will update the diff.
Thanks!