You can cause the passage of time in your Campaign via this module. It will add Days for the campaign as well as all Active Characters in it. It triggers time-sensitive checks for factors such as Disease Contraction, Shop Buyback rate changes, etc. It will also age your active characters. I generally advance 1 day each time my players pass a night in the game. It’s a quick, single slick of a button that calculates Disease Contraction potential, ages my characters, accrues monthly character expenses, all at once and automatically. Saves me oodles of time, rolling, referencing tables, and documentation.

It is recommended that you use this module whenever possible, as opposed to simply editing the Day in General Details. The latter will edit the Day but impact nothing else. It could therefore throw your Character Ages and Campaign Days out of sync, as a for instance. To remedy this you can also manually edit Character Ages on their Character Sheet if you wish.