In order to set your date and time on your MacBook, open System Preferences and click the Date & Time option below System menu. Set the correct date using the Calendar option and the correct time using the Clock. After that, click Save and press the Time Zone tab. Select your current location and then press the Clock option to set the time and date format. If you still have issues, you can get in touch with the Support Team using the contact information from the official web page.