Do you see the front or back of the constellation on the Gregorian birthday?

No one answered your question because you didn't make it clear: "Look ahead or behind".

Looking at the horoscope on the birthday of the solar calendar means looking at the date of the solar calendar, not the date of the lunar calendar. In general, the Gregorian calendar (Gregorian calendar) is the main one. It is displayed in Arabic numerals and in Chinese characters in the lunar calendar.