1. Click on AdminCP

2. Click on Winner Management

3. Click on Winner List

4. Locate the contest win you'd like to adjust the giveaway date for and click on Info & Media Files

5. On the contest win profile, click on Edit Winner

6. Click anywhere in the Giveaway Date field to edit the date

7. Use the calendar widget to pick the date

8. Click on Save Winner Information and you're done!