Yes. If you work on the same projects and tasks from day to day, copy your last timesheet instead of entering it again. Avaza copies the entries with their hours.
Copy your last day
Open Timesheets in Day view and go to the day you want to fill. The day has to be empty.
Click the ⋮ menu next to the date and choose Copy most recent previous timesheets over, then confirm.

Avaza copies the most recent earlier day that has entries, so on a Monday you usually get Friday's. To change the hours, edit each entry.
The ⋮ menu only appears on a day with no entries.
Copy last week
Open Timesheets in Week view and go to the week you want to fill.
Click the ⋮ menu next to the week's dates and choose Copy over previous week's timesheets, then confirm.

Change any hours in the grid and click Save.

Each entry goes to the same weekday in the new week. Copy only once: a second copy adds every entry again, and a cell holding two entries can then only be changed in Day view.
What gets copied
The copies are saved straight away, and there's no undo. Delete any you don't need.
- Copied: the project, category, task and hours.
- Not copied: notes, and start and end times.
- The copies use the current rates. They start as drafts on projects that need approval.
- Skipped: entries on archived projects, in disabled categories, and on projects where you no longer have Timesheet entry allowed?. So are entries on completed tasks, if the project doesn't allow time on them.
- Projects that require notes are skipped, because the copies have no notes. Administrators, Finance Managers and Portfolio Managers can change this with Allow copying previous timesheets even for projects where notes are mandatory in Settings › Timesheet Settings. Add the notes after you copy.
- Locked dates: you can't copy onto dates before your account's lock date, unless you're an Administrator. See locking timesheets.
Administrators, Finance Managers and Portfolio Managers can copy for someone else: choose the person at the top of the timesheet first. See editing another person's timesheet.