All of the analytics that Plann shows for your accounts are shown in your local timezone, and we calculate these according to the engagement ratio of your posts from the last 30 days.
Your "Best Times to Post" is calculated based on engagement from your previously posted content. This shows you when your audience is most online + most likely to engage (like, comment, share, etc.) with your content!
When your audience is most online is based on when your followers are most active on social media.
These are guides and we recommend experimenting with each to see which works best for you!