Molten Sulfur Blog

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Every month or so, I publish an article about something cool from real history or folklore: something interesting to learn about in its own right. Then I show you how to file the serial numbers off it so you can drop it into the RPG campaign you’re already running. Check the searchable, filterable back catalog to find the perfect scenario, NPC, or adventure site for your game tonight!

My name is Tristan Zimmerman (he/him pronouns). I’m a U.S. Navy veteran, author of several RPG books, and a big fan of RPG content based on real history. I believe such material is richer and more vibrant, and that your players will appreciate the difference. I’m always happy to appear on podcasts.

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Two Calendars in Augsburg

In early 1582, Pope Gregory XIII announced that the calendar date of the day following October 4th that year would not be October 5th, but October 15th. This was part of a packet of calendrical reforms we now call the Gregorian calendar, and which most of the world uses today.

But this reform came at a weird time. For 65 years, Europe had been roiled by the Protestant Reformation, which was about a lot of things,