It appears to be that you are, or have been using iTunes to sync your calendars. If that is true, iCloud is an option for your situation.
iTunes 11 for Mac: Sync contacts, calendars, and other info with iPod, iPhone, or iPad explains the changes that have taken place since Mavericks/iTunes 11.
I find iCloud convenient and reliable for Calendar syncing. Since you have the required equipment and software, I recommend that you consider using it.
If security of your data is a concern read:
Setting up iCloud is best described by reading: