YOU SAID:

when the sun turns brown it becomes BC

INTO JAPANESE

太陽が茶色に変わるとき、それは紀元前になります

BACK INTO ENGLISH

When the sun turns brown, it becomes BC

INTO JAPANESE

太陽が茶色に変わると、紀元前になります

BACK INTO ENGLISH

When the sun turns brown, it's BC

INTO JAPANESE

太陽が茶色に変わるとき、それは紀元前です

BACK INTO ENGLISH

When the sun turns brown, it's BC