Highlighting cells on a month level

[kansimies]

Hello,

I have tried to highlight weekends on a gantt with multiple zoom levels. I ran into an issue where the whole month as a cell gets highlighted if the month starts on a Saturday or Sunday.

Snippet can be seen here: https://snippet.dhtmlx.com/9hoep8a3

Currently I can go around this by checking the current zoom level, the problem is even bigger though if I apply the same styling to a timeline where the whole month gets highlighted.