Plot time series with differing dates

I have multiple time series on different days. I want to overlay Monday, Tuesday, etc. on top of each other in the same plot, instead of one after the other.

Originally, I used the format HH:MM, but due to missing x values I ended up with them being out of order.

Then, when used the datetime format, it showed them spread out across the entire week.

How can I get my intended behavior?