When looking at the forecast, the day/date is one day off. It currently shows that it’s Sunday the 12th even though it’s Monday the 13th. This is seen on Android phone, Apple tablet, and Windows PC (Firefox).
Attempted closing app and clearing cache. Tried connecting to Windy on WiFi and Mobile data. The first picture shows the issue.
Clicking around, it appears that there is a "split" down North and South America where the west shows Sunday and the correct time (Late morning at this point) and the east shows Monday but the highlighted time is 0:00. The "split" doesn't appear to be lined up with a timezone. For example, the second picture is North Carolina.
Everything appears normal all around the rest of the world. This last photo is a town in Svalbard.
Pardon my imperial units.