What's the meaning of solar farming in lunar calendar on Kitchen God's New Year pictures?

The man next to Kitchen God is his wife. Eat honeydew melon (maltose) in the off-year (the 23rd day of the twelfth lunar month) and report to the Jade Emperor in the sky through the chimney. Because the maltose I ate stuck to my mouth and I couldn't explain it clearly, I didn't tell the Jade Emperor about the bad things at home. Besides, so many families in China, so many grandfathers with kitchen stoves, wiped their faces and mouths when they passed the chimney. Because the function of honeydew melon is not clear, and at the same time, the jade emperor has no choice but to reward all of them. Set off firecrackers on New Year's Eve to welcome Kitchen God home.