X 天后(前)是星期几? shi shenme he yongtu shi shenme?
加减天数后计算结果日期和星期。
加减天数后计算结果日期和星期。
🗓️ Result date = base date + N days (or minus if negative).
The weekday is then derived from that date.
加减天数后计算结果日期和星期。
Shuru biaodan zhibiao, dianji "calculate", mashang kan dao jieguo.
Shi de. Ni keyi zai shouji huo diannao shang mianfei shiyong zhege jisuanqi.
🗓️ Result date = base date + N days (or minus if negative). The weekday is then derived from that date.