Take a look at this: https://www.themoviedb.org/tv/87507-da-norge-sto-stille/season/1/episode/1?language=no-NO

In the description, all the dates seems to have been converted to the first of the month. For example the first episode reads: "1. og 29. september 1994". If I try to edit these, the correct date is displayed: ("28. og 29. september 1994")