We all should back our stuff up frequently and often. With the advent of iCloud and Time Machine, keeping your Mac and the important things on it backed up has gotten easier, but there’s always a good reason to back stuff up when you can.
Reminders often have a lot of important data about us, our schedules, and things we really need to do. Keeping these backed up separately, in addition to the system wide backups we all should do, is probably a good idea as well. Here’s how to back them up, and to restore them when you need to get them back.
First, launch Reminders on your Mac, either from the Dock, or the Applications folder, or with an applications launcher like Alfred.
Once launched, click on the Reminder list you want to back up, or hit Command-A on your keyboard to select all of your Reminders lists. When you’ve selected the list or lists you want to back up, head up to the File menu and choose Export… You’ll be given the opportunity to change the name of the resulting .ics file, and then click the Export button in the lower left.
To get them back after a clean install, or to import them onto a different Mac, simply go to the File menu, choose Import… and then navigate to the .ics file you created in step one, above. Hit the Import button and let Reminders do its thing.
Now you can rest assured that your Reminders are safe and sound, in case something happens to your Mac.
Via: Macworld Hints