@OP, anniversary week is during the 3rd week and if it is like every other anniversary/holiday week, don't expect much.

Here are some links for past anniversary for you to judge:

3rd anniversary - https://forum-narutoen.oasgames.com/page/show-post-41982-1.html

2nd anniversary - https://forum-narutoen.oasgames.com/page/show-post-33370-1.html

as for 1st, anyone who was there at that time knew what happened haha