Star God Ruler of the Moon

At midnight on February 2019, 2, inside Chaldea.
After completing a day of research, Da Vinci picked up the calendar on the table and saw that the date was circled with a red pen. He couldn't help turning his head to look at the master who was already sleeping on the table.
Da Vinci: Was it marked by the master?Is there any special purpose?Birthday?
Matthew, who was still asleep, took the glasses on the side and put them on, sat up and looked at Da Vinci.
Matthew: Sorry, Miss Da Vinci, senior's birthday is xx, xx.Although I saw the senior marked this date a long time ago, I still haven't figured out the purpose.
Holding a pipe, Holmes stepped out of the darkness, and put a pair of eagle-like eyes on the calendar in Da Vinci's hand.
Holmes: I seem to smell a puzzle, do you need help?
Matthew and Da Vinci nodded, and raised their index fingers to their lips to lower their voices. At this time, a sound-proof barrier was placed on the Master's body, and Merlin followed closely.
Merlin: Since you're afraid of waking up the master, wouldn't it be okay to do this?Alright, I see you guys seem to be discussing interesting things, so here we go.
Holmes: No one in Chaldea has February 2th as their birthday, right?Also, I don't remember any scheduled activities today, so...
Before Holmes could finish his conjecture, another voice sounded in the Master's room. It was the elderly Li Shuwen in Chinese tunic suit who came.
Li Shuwen: It's a holiday. Today is the beginning of the Spring Festival.
Da Vinci: That's right, today seems to be New Year's Eve. From the perspective of the country where the Master is located, it is a great holiday.
Holmes: Really?Although I don't know much about it, I do hear that this is a lively and festive festival, comparable to Western Christmas.
Matthew: Is it a holiday in the country of your predecessors?I've seen the same markings on calendars before, but didn't expect this to be the case.
Merlin: It seems that the Master has been enduring the loneliness of wandering in a foreign country. Although this proposal seems a bit late, why don't we mobilize everyone to celebrate the Spring Festival together?
The people present pondered for a moment, then nodded in response to Merlin's suggestion, just as the followers also needed a grand banquet to relax.
Da Vinci: Then Mr. Li, please tell us about the customs of the Chinese New Year first, so that we can give the Master a big surprise!