There was a post here not too long ago, within the last week or two weeks or so, where someone asked about writing Nengajo for coworkers. I work in a senior high school, I’m an ALT. The OP was in a similar situation. Its possible the post was in /r/teachinginjapan, but I’ve searched both subreddits relentlessly and cant find it.
The top comment essentially said, don’t bother with Nengajo, but pick up some sweets and [I can’t remember]. Someone suggested things to write, it was something along the lines of “2022 otsukare sama deshita. 2023, blah blah blah.”
I think the comment was completely right that this is probably better than Nengajo, but now I can’t find the post! I even searched my browsing history and everything. If anyone has recommendations of what to write, please let me know. Nihongo wakaranai. I’m going to pick up sweets before work today and distribute them at our bonenkai replacement bento lunch today.
Thanks