QB Issue Resolution:

QuickBooks Mac does not have a built in calendar. There is integration to some extent with iCal. This is done on a per transaction basis. At the bottom of most transactions (Bills, Bill Payments, Invoices…) is a Calendar icon. This will add the transaction to iCal based upon what it is (bill due date, invoice date, date of bill payment…). It creates a new calendar for each company file you have in QuickBooks. There is no automation as far as getting items to the calendar – per transaction.

I believe QB Win has an activity calendar similar to Quicken built in. That is not part of QB Mac.

Follow Up – I use the iCal integration for client files that have limited activity. For these files I may be in only once or twice a month it puts a reminder on iCal to go into the company’s file and pay a recurring bill

Resolution for Issue 'Does Quickbooks 2015 for Mac have a calendar?' available: Yes (Solved).
Source: Intuit Community forum.

Does Quickbooks 2015 for Mac have a calendar?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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