In which era did girls wear ponytails more?

The 1970s. The era is to divide the historical stages of social development according to certain characteristics. In the 1970s, the double ponytail on the head was a symbol of women in that era. So the girl in the 1970s, Dozza, had a ponytail. Double ponytail is a hairstyle, which refers to a hairstyle with symmetrical ponytails tied on the left and right sides.