I would like to make a calendar of past Supply Depot sales from October 2018 onwards. I tried to experiment a bit with how would such calendar look and I ended up with 2 variants: "vertical" and "horizontal". Which one is better? Or do you have a better idea? Both my variants can be found on the wiki sandbox page: https://wiki.spiralknights.com/Sandbox
There's only October 2018 for now, but for following months I would create new tables where at the beginning would be items still on sale mentioned again (that means the vertical variant would be divided into separate months, it wouldn't be one extremely long table). I plan to make a separate page called "Calendar of past Supply Depot sales" (or something similar) consisting only of these tables.
I think the horizontal variant (x axis = time) looks prettier and that the vertical variant takes a bit too much space, but the vertical table looks easier to modify and "template-ize". I also don't want the tables to be very wide so it can be easier to view on smaller screens (on mobile phones, for example) and if they would be very wide, it's probably better when some items don't fit on the screen (vertical) than have to scroll to see rest of the days of the month (horizontal). But the concerns about width and editing are probably not important because the tables wouldn't be very important or modified too often.
I've looked at your prototypes, but it's hard for me to imagine how the final page will look, because I know so little about these sales --- how often they are, how much information should be recorded for each one, etc.
That said, the key consideration for me is that horizontal space is limited while vertical space is not. Everyone expects to scroll up and down, and it matches well with how we generally read, but scrolling left and right is annoying. So I vote that you make the tables narrow (left-right) and long (up-down).