@BluSpoon
@lemm.eeI'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.