If you recorded working hours before Timebutler, you often want to import the old time entries into Timebutler when switching to Timebutler.
However, Timebutler intentionally does not offer a bulk import for time entries, because you do not need to import old time entries into Timebutler for the following reason:
When you enable time tracking in Timebutler, you also set the date from which time tracking should start in Timebutler. You can also set the initial overtime balance for each employee as of that date. Employees therefore start on the set date with the entered initial balance. Time entries recorded before the start date are therefore not relevant for Timebutler and do not need to be entered or imported into Timebutler.
Read here how to set the [start date for time tracking and the initial overtime balance(/time-tracking/working-time-account/start-of-time-tracking/) for employees.