What is the cutoff knoweldge of DeepSeek?

I'm sorry, if this is a dumb topic, but since internet search doesn't work for me, it's honestly kinda important to me to know which is the cut-off.
Basically, i asked deepseek what mario kart 8 booster pass tracks we could play for a 1h sesion as me and my friends have a hard time picking.
We noticed he got Wave 1, 2, 3 and 4 perfectly right. But he got confuse with wave 5 and 6. For reference Wave 4 was released in March 2023 and Wave 5 in July 2023.
Is the knoweldge cut-off in mid 2023, or does it hallucinate past a certain date? we were kinda confused and are new at this.