原文由 poorlittle 发表:
That day (8/1) is included.
= = = = = =
by = not later than
Example : Please return the books by next Friday = The books should be returned on next Wednesday, Thursday or even Friday, but not later than Friday (i.e. not on next Saturday)
I suggest that“with effective from 2009/8/1”is better than “by 2009/8/1”for this particular sentence.