Student or Learner
1. Can I use "by" for the timing ? or should be used "at"
e.g. I am go to school by evey evening
I have my lunch by 1:00 o'clock every day
2. Can I use "for" for the date ? or should be used "on"
e.g. I have book the tennis for March 30
Please arrange the document to me on March 30
notice that on March 30=exactly on that day wheraeas
by March 30=not later than that day
but it could be sooner than that day (March 30)
Yes, I agree with Banderas.
Many thanks for clearing the ambiguity.