List here best April fools jokes you have come across.
I'll start with these:
To add visibilty Helsinki police (others later) will start using overalls in metallic pearly pink color.
During night time the color automaticly chances in to neon violet.
They also are liquidm stain and especially donut sugar resistant:

Police of Eastern Uusimaa has hired drug mule that can tell the difference between weed and grass because its sense of smell is 100-1000 better than human's:

Ikea has finally decided what to do with the piece of land they bought three years ago in Lappeenranta.
They will erect a windfarm.
In case people are dissapointed that Ikea will not build store there and as Lappeenrata is getting rid of plastic trinkets in the name of enviroment all city's disposable cups are given away free at townhall's customer service office.
It is unknown can one also get there free Ikea buckets (inside joke in Finland: If store gives out something free you'lll get long cues outside. First major case was store offering free buckets that people drove hundreds of kilometers to get) or electric contracts with free transfer (In Finland electricity is cheap but the transfer rates are high):

EU is ordering Finland to change name of kalakukko one of traditional foods as the name is confusing and/or false averticing.
Direct translation is fishcock (or fishrooster):
