Your timezone controls when your timeslots fire. If your timezone is set incorrectly, posts will publish at the wrong time.
How to set your timezone
Go to Settings (click your name in the bottom-left corner, then Settings) and select your timezone from the dropdown. Click Save.
Auto-detection
When you first sign in, PostRecycle tries to detect your timezone automatically from your browser. If the detected timezone looks correct you do not need to change anything.
Why it matters
All timeslot times you enter are interpreted in your chosen timezone. For example, if you add a timeslot at 09:00 and your timezone is Europe/Belgrade, the post will publish at 09:00 Belgrade time — not UTC.