From More > App settings > Calendar sync, you can get your band's events into your phone's regular calendar app — how far that goes depends on whether you're on iPhone or Android.
Tap Subscribe and confirm in Calendar — this is a real, ongoing subscription: new and changed events keep appearing automatically afterward, no need to repeat this.
Tap Import now — Android's own Calendar app has no public way for an app like Mozzy to set up an ongoing subscription on your behalf, so this hands your events to Calendar as a one-time import instead. Repeat it whenever you want the latest events; it won't create duplicates of ones already imported.
Either way, this is your own personal agenda — only events you're actually invited to, tied to your login, not a public band calendar.