Hi all,

After having spent a few hours on this stupid problem I decided to post something here to request your help.

I'm trying to build a timeline with our project date (in a stacked bar chart).

Here are my data :
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Here is the current chart :
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My issue is with the label of the X-Axis (dates).
I would like to show there only 1st of each month.

I don't know why but I can't change the axis type to date in the axis options.
Then I'm not allowed to have date units option (to set a first value to 1/10/16 and unit of 1 month).

Here are the option of the X-axis
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Could you please help me understanding what's wrong ?
It is slowly driving me crazy

Thanks in advance !