Has it ever been conclusively stated whether or not Golarion has leap years. I was thinking of pulling a stunt on a player of mine when they picked up Planar Binding.
Source Pathfinder Player Companion: Mythic Origins
You have a way with words when dealing with extraplanar forces called to the Material Plane to serve you. When bargaining with outsiders called via a planar binding or similar spell, you add a bonus equal to your tier on Charisma checks against the called creature and on caster level checks to prevent the creature from escaping your magic circle. In addition, you can expend a number of uses of mythic power equal to half the Hit Dice of the outsider to attempt to bind the outsider to perform a task for up to a year and a day. The creature gains a +5 bonus on the opposed Charisma check to refuse this request. If the outsider agrees to carry out this request, it is bound to perform that task for up to a year and a day or until otherwise released (either by completing the task or by your will). You cannot regain that use of mythic power until the outsider is released, effectively decreasing your total number of uses of mythic power per day by the number of uses spent to bind the outsider.
If it were a leap year, an outsider would be forced to serve for an extra day it wouldn't normally need to. That could bring along some unexpected havoc, especially since some outsiders are extremely proud. Thoughts?
Here's what the Inner Sea World Guide tells us:
Golarion spins on its axis roughly once every 24 hours. A week consists of 7 days, with 52 weeks per year. A year has 12 months, each of which corresponds to a popular deity and (roughly) to a single cycle of Golarion’s sole moon. In order to most accurately reflect reality, many calendars across Golarion add in leap days. In the Absalom Reckoning, the leap day is tacked on to the end of Calistril and occurs on every year divisible by 8. Thus, the current year (4711) is not a leap year, but 4704 was and 4712 will be.
According to James Jacobs, the Golarion calendar matches up with our own on a 1:1 basis, except for the leap year. However, based on his thoughts, it would probably be best if everything matched perfectly.
1) Yes; it pretty much matches the Gregorian calendar. And I kinda wish I'd fixed the leap year stuff too.
In short, yes, there are leap years.
Ick. <goes off to rewrite program code> (on the other hand, glad someone brought this up - thanks! :) )