yup, sure is!

I've been trying to recall the name of remind! Used it years ago, great for conditional dates (bin collections especially, every other Monday, except public holidays, then move to Tuesday). I can't recall the syntax but really useful.

Have not tried wyrd, I just emailed myself daily with the calendar. Will take a look

Thank you internet stranger!

Personally I opt for zabbix. But I've been working with it for years. Simple deployment, lots of support, just works.

I'm about quarter of the way through 2, really enjoying it.