1. From the pipelines list page, click a pipeline to go to the pipeline detail page.
  2. In the vertical navigation bar on the left side of the screen, click the link for Backfills.
  3. Click the button labeled + Create new backfill.
  4. Under the section labeled Backfill type, select Date and time window card.
  5. Enter a name for your backfill.
  6. Select a start date and time.
  7. Select an end date and time.
  8. Select an interval type; this value will help determine how many pipeline runs to create.
  9. Enter an interval unit; this value is multiplied by the interval type to determine how many pipeline runs to create.
  10. Click the button labeled Save changes.
  11. Once the backfill is successful saved, click the button labeled Start backfill.

Check out this blog article for more details!