I’ve actually built a reminders app named Memento, which uses the same database as Apple’s app. I added functionality to delete all completed reminders for just this case lol. https://getmemento.ca. Source: about 2 years ago

I just shipped a big update for iPads in my app Memento: https://getmemento.ca. Source: over 2 years ago

I’ve built Memento to use the same database as Apple’s reminders app, and the widget shows the date for the reminder. Check it out here: https://getmemento.ca. Source: about 3 years ago

I am planning on adding recurring notifications to my reminders app, Memento. Check it out here: https://getmemento.ca. Source: about 3 years ago

For tasks, check out Memento! It’s a reminders/tasks app I built to integrate with Apple’s reminders database. https://getmemento.ca. Source: about 3 years ago

Not quite what you're looking for, but perhaps a start: you could use Festival Finder, then find Glastonbury and it'll tell you your top matching artists. It can also spit you out a playlist of the artists playing the fest that you've listened to on Spotify. Source: about 1 year ago

Https://festivalfinder.co/ - Compare the bands and artists you follow with over 1000 festivals all over the world to find the one that matches you perfectly. Source: almost 2 years ago