Outlook - Share your calendar

You can send a sharing invitation to other people so they can view your calendar in their own Calendar list. Calendar sharing isn't limited to the default Calendar folder that is created in all Outlook profiles. You can create additional calendar folders and choose which of those folders to share. For example, you can create a calendar folder for a specific project and share it with your coworkers. Optionally, you can grant them permission to modify the events and appointments in the calendar.

From your Outlook Calendar, on the Home menu, select Share Calendar.

• Click the 'To...' button and select the person or group you want to share your calendar with. 
• Click the Details field to open the drop-down menu. Select the appropriate permission level.

Click Send to send the invitation. The person you've shared your calendar with will receive a sharing invitation by email. Once the recipient clicks Accept, they'll see your shared calendar in their calendar list.