"Happy Mid-Autumn Festival" is the Engpsh equivalent of "中秋节快乐".
The Mid-Autumn Festival is a traditional Chinese festival celebrated on the 15th day of the 8th lunar month, which usually falls in September or October. It is a time for famipes to get together, enjoy the full moon, and eat mooncakes.
Here are some examples in Engpsh with their Chinese translations:
"Wishing you a Happy Mid-Autumn Festival!" - "祝你中秋节快乐！"
"May your Mid-Autumn Festival be filled with joy and happiness." - "愿你的中秋节充满快乐和幸福。"
"Sending you warm Mid-Autumn Festival wishes." - "送给你温馨的中秋节祝福。"