Seeing as I've decided to use lojban as the IAL for AEfter Ragnarok (easy way to facilitate communication between people who don't speak the same language; all people are strongly encouraged to learn their own culture, language, traditions etc first and foremost), I figured maybe I should have a "culturally neutral" (or something to that effect) global calendar as well.
The calendar reform article on Wikipedia had a bunch of links to check out.
The most popular types of calendar reforms seem to have 13 months with 28 days with intercalary ("leap") days and/or weeks to adjust for the fact the planet takes a slightly incomvenient slightly less than 365.25 days to potter around the sun. The extra month tends to get grafted between June and July and called Sol or Luna. One calendar called it Aten.
A lot less common (I've only managed to find one easily, probably would find more if I looked harder) were calendars based off varying the number of days in a week, like 6 Day Week, which advocates dropping a day from the week (they proposed Tuesday and gave reasons why) to make a 4 day work week with the standard 2 day weekend, 12 five week months of 30 days each and an Intercalary Period of 5-6 days depending on whether or not it's a leap year.
So, looking for a calendar that's either reasonably culturally neutral or at least flexible with the naming conventions and isn't going to blow my head up with implementation.