Haven't there been some other major Chinese models that released on a Sunday night in American time zones (Monday in China)?

I remember some people mentioning it when the Qwen3.5 models were looming and people were arguing with each other on here about whether a Sunday release day was plausible or not. I can't remember what the major Chinese model/models was/were that dropped on a Sunday that they made reference to, like if it was DeepSeek or an earlier Qwen model, but I think it was a major one that had dropped on what was a Sunday night in American time zones or something.