Board Thread:Questions and Answers/@comment-37562489-20181120220007/@comment-32271305-20181120221445

Some people like to save stones for months and months in order to take advantage of Christmas and anniversaries, others like to summon whenever they see something they like in order to have more variety in their box, so my answer is... it all comes down to luck in the end, do whatever is more fun for you.

But yes, Christmas and anniversaries are definitely the best times to summon, because they release banners with great units and with great discounts as well.