No,  you can’t do that on the weekly time sheet, but you can edit each time entry and change the date.

Resolution for 'adjust the dates issue: 'i entered my timesheet on the wrong week, can i adjust the dates on the timesheet without reentering' available: Yes.

The adjust the dates 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 adjust the dates issue yourself by looking for a resolution described in the article. If it is a complex adjust the dates issue or you are unable to solve the issue, you may contact us by clicking here or by using other adjust the dates support options.

For more information about resolving issues related to adjust the dates in Quickbooks/QBO or to get support for the issue 'i entered my timesheet on the wrong week, can i adjust the dates on the timesheet without reentering', click the link below: