Harmony day in China is called "操你妈"
和谐/Héxié
和
平日 or 平日
changt CHA GA SAT
Zhǒngzú héxié rì种族和谐日
it should be about harmony and harmony things that happen on harmony days
The English word "harmony" has several versions when written with the Chinese alphabet. However, when written with the English alphabet it translates as "hexie".
To write the Chinese character for "day," you would write the character "日" which is pronounced as "rì" in Mandarin. It consists of four strokes and represents the concept of the sun or daylight.
Harmony Day is a day of cultural respect in Australia. The main objectives are inclusiveness, productivity diversity, and community harmony.
You can write "Lien" in Chinese as "连".
I think Harmony Day was introduced to Australia in 1998
Happy Mother's Day can be written in Chinese as 母親節快樂.