Note: If you are using the Insights Reporting, you will not have access to the goals feature. Goals will be released on Insights by October 2020.
Currently, this can't be customized, and is set as follows:
- Weeks start from the beginning of the working week (set by your Date/number format settings).
- Months start from the beginning (1st) of the calendar month and finish on the last day of the calendar month.
- A year is a calendar year from the 1st of the month when the goal is set.