Add customization to the X-Axis ( time )

### Problem Statement

I would like to show timestamp/dates that make sense for the data I am showing in a graph/chart.

Currently, X-Axis date/timestamp seem to be restricted to [Month Day Hour].
It works, but it is missing some information that is useful, and has information that I personnaly do not need.

Missing:
1) Day name
=> To identify easily the period of the week and easily associate drops with weekend days without having to check a calender.

Not needed:
1) Hour
=> When interval is daily, or the time range is wide ( 15D+ ), showing the hour doesn't really give much info
( especially since it seems to be fixed, on my charts it always show 4:00 AM )

Additional useful parameter:
1) Axis indicator count
It would be helpful to customize the amount of descriptor there is for each axis.
If I'm making a graph that looks only at the 7 last days, maybe showing each would be pretty readable, and better than the default 3 I am seeing currently ?

Note: I've only really used Dashboards and Discover currently, so if this is doable in another tab/charts, please redirect me! ( Althought it would be useful there too! )

### Solution Brainstorm

The most straightforward way to add it that I can see would be to add a few more of the category below the graph.
Currently I see Interval, Display and Y-Axis.

It would be nice to add an X-Axis Display, which could have a list of each timestamp parameter that can be toggled.
That way you can customize it as much as needed ( Day, Day Name, Month, Year, Hour, at least, but some formating variation could be added later ).

A text box/dropbox where you could enter a number for the indicator count of the X and another for Y would be helpful too!

### Product Area

Dashboards

Start by locating the dashboard and Discover chart implementation that formats X-axis timestamps and controls axis indicators. Compare the current behavior with the requested day names, optional hours, date components, and configurable indicator count; done means the intended settings are defined and the resulting chart labels match them.

Written by the indexing model from the issue text.