The new Chinese character created to mean evening is 暮, which is composed of 莫 and 日.
First 莫's original meaning is evening already. By adding 日 it makes 暮 different than 莫.
Second 莫 was borrowed to mean Not, 暮 is then to mean "there is not Sun to be seen"! So 暮 does mean evening.
Let us check 暮's ancient scripts to confirm our observation: (image taken from http://vividict.com/)
|Learn one Chinese Character a day - 暮|
After finishing our learning, let us enjoy a Chinese calligraphy with 暮 inside, as usual:
In our next a few lessons, we are going to learn 杲 and 杳, guess their meaning?