Taken from this source.

"Even so, this still won’t make up for all of the time lost from our original schedule. As a result, unfortunately, we’re going to have to forgo the event planned for a national Japanese holiday in early May. Since the April seasonal event kicks off later than intended, it will continue even after April 24th in the real world—whatever that day may be. I realize this is all less than ideal, but hope you understand and bear with us."
Will this possible event see the light of day this year? I'd like to know what YoshiP had planned last year