We had a few different timestamp formats across the api.
relativeTimeand sometimes it was just a unix timestamp or an ISO timestring.
We standardised these to just
timestampthe unix timestamp and
timestampISOthe ISO version in all routes.
If you have a custom theme you need to
timestampISOon teasers if categories/home page
But... It's a breaking change.
You should not do such stuff when you have now 1.0