I think it's fair to base the icons off of the northern hemisphere, since the majority of not only people but also, more importantly, the MB community, is there. Same reason the eastern and western USA timezones are listed for events.
I'd say that January and April/May (Google says April, MB site says May) could use MBU and MBG (other than Groovyball ofc since that's June, we don't need any more generic pandery rainbow icons) textures respectively, but that'd be kinda unfair against MBP since that came out in December. Maybe MBP textures could be used for December and the Winterfest icon for January? "Winter" is all January's really known for other than New Year's, which is kinda hard to do.
-January: Maybe the MBU textures? Just match up the original PQ logo's textures with MBU's (aka replace the PQ wall texture with one of MBU's)
-February: I REALLY like Az's February ones, especially the middle one. I'd love for that to be used in the future.Instead of having that pixel heart though it should just be similar to that shape, but styled like the rest of the logo.
-March: Not a huge fan of how specifically THAT version looks, but again I like Az's bottom March one a lot, with the green "foreground" and gold "background"
-April and May: Don't have many ideas for either but one should be MBG in a similar fashion to January's MBU one. Maybe even just use the logo of the new community server for that instead of replacing parts of the original PQ logo.
-June: good luck suggesting anything else
-July: Original PQ logo ofc
-August: Something summery probably
-September: Since we have a pride PQ logo for June I think we should have a lust PQ logo for September. idk where to fit the other 5 sins tho
-October: Frightfest
-November: Something autumny. I actually made a mockup here, but like I said for March, this one doesn't have to be final, just something like it. Also I totally stole that leaf shape from the Canadian flag. I wanted to make the red a little more vibrant but idk how to do that without it standing out too much, and possibly more than the actual sort of "foreground" part of the logo
-December: I guess Winterfest.