Local timezones.
Source: Norwegian Meteorological Institute, Canada/Quebec/Montréal
2 points
*
That is my guess, and it make sense.
But I would have be helpful with some conformation.
Time zones
All notices on yr.no are displayed in local time for the city to which the notice applies. I.e. that a notice for e.g. Beijing in China is shown in Chinese time; 12 o’clock is therefore the middle of the day.