Max for Blessings

I get war blessings can only be extended until the end of the next war season.

What’s the maximum time you can extend a normal blessing?

It is unlimited

WOW!

After the end of the season are extended for 7 days all buffs or only new ones ?
 

After each war season ends, you receive the blessings from the league where you finished. You have to pay gold to extend them. The maximum time you can extend a war blessing is until the end of the next war season.

This is correct.