The Joy of Calendars

I was asked on a forum once whether (among my many other cultural game fillips) I utilized IC calendars.  Good heavens, all the freaking time, was my response.  Since my gameworld isn't a one-dimensional save point between dungeon crawls, seasons happen.  High holy days happen.  Traditional village celebrations happen.  Lunar phases happen.

The party might pass through a village where the locals aren't ready at the drop of a silver to cater to their needs, because it's the day of the midsummer Fire Dance festival, and everyone who isn't wearing a costume and capering on the cliffside is a spectator cheering the dancers on.  (Plenty of free ale and festival eats, though!)

It does make a certain sense to hire an orc as your "Green Man" ...

The party might be looking forward to the high holy day of the state religion,  nine days from now, when people wanting to undergo vision quests in the precincts of the High Basilica have unusual success in seeing the path.  

(They'd also better plan on about twenty thousand pilgrims hitting town a few days beforehand, and every inn and tavern space booked up.  This would also be a factor in large-scale seasonal trade fairs, celebrations of the monarch’s birthday, and all manner of predictable events of which the locals would take advantage.  I once lived in proximity to New England’s regional fair, which takes place over two weeks and three weekends, it’s sited in a small city, it averages almost a hundred thousand visitors a day, and homeowners within a half-mile make hundreds of dollars a day selling parking spots.)

The party might be hellbent on getting down to Veredar Island NOW, because the monsoon season's kicking off down there in three weeks, and even with a weather mage witching the sails they'll be cutting the timing fine.

The party might be hoping for a moonless night to make that strike, and the scholar with the ephemeris knows the next one is four days from now, but the next one beyond that is fifteen days down the road.  (Hope she made the roll by enough to know that Rosverando's Comet is due to hit perihelion fourteen days from now, so they better not dawdle.)

And the party might want to pitilessly kill every damn partying local blowing a vuvuzela underneath their inn window ...

All this is fixed; I run a sandbox.  Part and parcel of that is I don't throw in bullshit "coincidental" monsoons/eclipses/full moons just to provide random extra obstacles to the party.  I don't see why a group can't plan carefully to deal with seasonal/meteorological/celestial factors just as readily as they plan for fortifications, the strength of oppositions, the power of sorcerers, or any other such "traditional" wargaming-style complication ... and I don't see any reason NOT to hose a party that can't be bothered, the same way I wouldn't take it easy on a party that attempted a frontal assault against suicidally heavy odds.

Hard to create?  Not at all.  There’s going to be a spring planting festival: damn near every culture has one.  There’s going to be a harvest festival: damn near every culture has one.  There’s going to be a holiday celebrating the founding of the nation.  The ruler’s birthday will likely be a holiday ... and not only has more than one culture used that day to designate the new year, some of them have trouble in how the change to a new ruler upsets the bookkeeping!  Your religions will have holidays.  There’ll be the commemoration of a great battle.  (A number of nations commemorate great defeats!) A major athletic festival like the Olympics or the Kentucky Derby.  The traditional day every year when new apprentices are taken, or the knightly order elevates new knights, or annual quitrents are due, or the Blessing Of The Fleet takes place, or last year's wine is broached.  

Heck, one of the oldest known ongoing holidays is Lanimer Week in the town of Lanark in Scotland, which grew organically from the town being granted royal city status 900 years ago, a condition that the local merchants ceremonially inspect the boundary stones on that date each year, and celebrations springing up from that.  Or the town where I grew up, which has an annual celebration at the beginning of May based around the running of the herring.  (I am not making this up.)  Come to that, said town had an annual ritual as late as the 1980s where the selectmen would walk the bounds of the down, touching up the paint on the carved boundary stones.  This involved some measure of bushwhacking, with many of the stones being in forests or marshlands ...

So come up with a couple a month.  This is far from over the top; England celebrated 33 “saint’s days” before the UK’s holiday schedule was settled in the 19th century.  Plenty of online lists of such holidays and how they were/are celebrated – just file off the serial numbers and you’re good!