How to show a day indicator in timeline year view?

Event calendars & schedulers
1

I am trying to replicate the “current time indicator” but in timeline year mode, so instead of showing the current time, it shows the current day.

I am already highlighting the current day in the “day header” but this is not sufficient, my client is requesting a red line to be drawn across the day vertically (see mock-up below).

image

Is there a way I can programmatically solve this? I tried tapping in to the “renderSlot” function but it did not work.

Ideally, I want to override the rendering of the cells and apply a border if the cell’s date == today’s date.

2

I found this thread (Schedule Calendar in Timeline) which allows me to color the background for the current date:

image

Is there anyway I can control the width, so that it appears like a thin line?
I manually edited the 5th row CSS on the element to show what I desire