Edit date of a review
Go to your Ryviu dashboard > Reviews, select review that you want to display first, hover on it then click on Edit icon on that reviews, click in Create at, click Now to get the latest time and then click Save Changes button.
You can change the date to another date by click on a day in the calendar, click OK button and then click Save Changes button.
Edit date of bulk reviews
You can use CSV Live Editor feature to edit date of reviews. Please login your Ryviu dashboard > Products, hover on a product that you want to edit reviews, click on CSV Live Editor icon, click on date of review which you want it to appear first in Create at column, click on Calendar icon, click Today or select other dates. After done, please click Save button at the top right.
You are done.
All the best,
Dan from Ryviu