Add custom indicators (like the "now indicator")

The “now indicator” is looking pretty great!

I need to display another domain-specific indicator (at a fixed date in my case), but I can’t find a good solution for it.

I tried in the viewRender callback:

view.renderNowIndicator(myFixedMoment);

Seems to work well at the beginning (i.e. two indicators are displayed), but few seconds later, they get messed up, probably because of the interval of the “now indicator”.

I would need to add a custom CSS class to this indicator as well, so that one can distinguish them all. Could actually be nice to provide specific CSS class to the “now indicator” as well.

Is there any already existing solution? If not, what do you think of this?

[mcmule]

Same question here. Does anyone have a clean way to do this in 2021? (since this has been opened for 3 years+ and the feature does not exist yet)

[apoklyak]

Any updates? Is it possible to customize now indicator?