Hi, 

1) opening hours follows a specific syntax

https://wiki.openstreetmap.org/wiki/Key:opening_hours

you can validate it here

https://openingh.openstreetmap.de/evaluation_tool/?setLng=en

in this case the correct value is "May-Jun"

2) 
description=Torn
leisure=park
name=Jaapani lillevaatlusplatvorm

this polygon is really strange. Viewing platform is probably not a park and it shouldn't duplicate the tower node. I suggest you delete it and leave tower

3)
tower:construction=puit
Most tag values should be in English, unless it's about names or descriptions. This is also more like a material, not a type of construction.