digital circular calendar

I've been keeping observational records on my farm for many years and have used a circular calendar to hand write all that data into. Some of my observations include; plant observations such as - first bloom to last blossem... harvest dates... animal and insect observations such as-first pipevine swallowtail butterfly or hawk fledgling takes flight... weather and so on... What I am looking for, is a calendar app or program that allready exists, one that I could use to enter all of this data into, click a button and look at it in the circular calendar format (or multiple formats). Does this exist?
I also think it be amazing if we could upload observations online to co-create a world wide collection of observations. I'd like to set up a discussion for computer nerds to co-create this program. Let's do this!