Note:
In the v13 release, the Legacy Visualforce Matrix has been replaced with the more modern and feature-rich Matrix Lightning Web Component.
Migrating is a page change in Lightning App Builder: your data does not move and nothing is rebuilt. See Migrating from the Legacy Visualforce to the Lightning Web Component Matrix, or contact us and we would be happy to help.

The following is a list of available matrix View and Time Range options that can be selected by users or that can be set as default when creating a custom matrix:
| Available options for the Week view by: | Available options for the Day view by: | Available options for the Month view by: |
|---|---|---|
| Entire Year 1st Half 2nd Half 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Next 3 Months Next 6 Months Next 12 Months Next 24 Months | January February March April May June July August September October November December Last 7 Days Last 14 Days Last 30 Days Last 60 Days Next 7 Days Next 14 Days Next 30 Days Next 60 Days | Entire Year Next 12 Months |