Len'en anniversaries are celebrated every year on the 11th of November, because this is the date the Len'en Project was born, in the year 2013. Usually during this time of the year, JynX will post an illustration on pixiv and thank the Len'en fans for all their support towards the project. So far, they've created four illustrations, along with a transcript of a conversation amongst some of the Len'en's characters.
5th Year Anniversary
On 10th November 2018, one day before the 5th anniversary, Rei drew attention to two Twitter accounts, those of Hal & Hoojiro Shitodo, and had a small conversation with them.
On the day of the anniversary JynX uploaded a video in celebration, teasing upcoming merchandise and even a music CD.
4th Year Anniversary
|I drew this on Len'en's fourth anniversary~!|
When I realized it, a few years have already passed, it's time to express my appreciation to all the fans~
3rd Year Anniversary
|It's Len'en's third anniversaryyyy!!|
Thank you, fans!!!
|Another year from the second anniversary...|
It was long, yet quick (cold-eyed).
2nd Year Anniversary
|I gave it to theeeem.|
It's Len'en's second anniversary! (Pocky & Pretz Day)
|It's Len'en second anniversary.|
In celebration, I managed to create a Halloween ending-like image of Brilliant Pagoda or Haze Castle.