Here's the thing, my novel will be happening over the span of several years, at first it'll take place over a few days and then it'll take place over the course of a few years. The truth is that I thought to create my own months and days but honestly I've read several novels that make use of their own (notably Eberron novels) but I can't personally be bothered to keep track (you've got weird month and day names and such, can't be bothered to flip to the back of the book for reference every single chapter). How often are fictional calendars used in novels? I know Discworld has its own (I never read the series, just looked it up for reference) but the days of the week are mostly the same, which ought to simplify things greatly. Is it a good idea to make my own calendar or would I be able to get away with using real life months and days? What other fantasy novels can I check out to see how the passage of time was handled?