Determine the name (id) of the Google calendar you want to connect.
Step-by-step manual
For G Suite calendars only, a G Suite administrator must first set general calendar update options.
Step-by-step manual
Allow info@projecthours.net to write to the selected calendar.
Step-by-step manual
Enter the name of the calendar via menu option Administration, Organisation and click on 'Save'.
Click on button 'Validate and enable Google Integration' to enable Google integration.
And you're done! Project Hours will now save every hour entry to your Google calendar. If you update or delete time entries, the Google calendar will be synchronized.