My rides always post on the next day (or at a different time), so that on Strava it doesn’t show that the ride was for the right day. It sort of throws of my whole ‘black on every box’ for the calendar goal:) Why is this? I have all my settings right.
The timezone for the island is UTC +11, Zwift Strava uploads reflect the time on the actual island. And I’ll assume you’re on the other side of the international date line.
I use https://www.fitfiletools.com/#/top to adjust mine so it doesn’t mess up my Strava stuff.
Strava timeshifts the activity time/date based on the GPS coordinates of the ride, which in our case is way out in the pacific ocean. Zwift doesn’t manually de-shift the time because it’d break the ‘rode with’ feature, as well as the Strava ride playback which is used later for playing back the Tuesday and Friday night races we have.
It’s a known issue by us and by Strava so hopefully it’ll get resolved this summer.