
PoetiCal is a publication that can only be viewed through a Calendar app like Apple Calendar or Google Calendar. You subscribe to the publication the same way you would add any new calendar to your calendar app. For instance, you can open your Apple Calendar app, click File > Add New Calendar Subscription, and paste this URL into the box: https://poetical.day/cal.
Then, each day that an entry is set for publication, it'll appear in your calendar, right next to your work meetings, or reminders to drop your dog at the salon.