How to adjust the size of time cell

The first image is what I have now, the 2nd is what I want to code. Is it possible to adjust the size of time cell to make the width smaller?

Unfortunately, at the moment there is no way to set a specific size for the width of the cells in the timeline area.
You can set the minimum width with gantt.config.min_column_width.
Here’s an example in a snippet:
The width depends on the dimensions of the gantt container and the displayed date range. If the timeline width is small, then min_column_width may have no effect.
You may need to increase the date range or decrease the width of the gantt container in order for min_column_width to work.
If you have additional questions, write to us, and we will try to help you.

Thanks a lot. I tried to adjust the size of the gantt container, and it works!