From that day forward the Assembly was at odds with us.

Velzquez's work from that time forward was confned largely to portraits of the royal family.

from that day ，没有 on 表示 “来自那一天”，from 表示“来源”。例如：

We learned two things from that day.  我们从那天当中学懂了两件事。

只有在 from that day 后面加上副词 on, 或 forward 或 forth，这个 from 才不再表示来源，而是 “从...开始” 之意。所以，如果表达这个意思，后面的这些副词是不能省略的。

如果你见到省略了 on, 或 forward 或 forth，那就是不规范的表达。