"as of" or "as on"

Anonymous
Would somebody please tell me which is correct:

1) The progress is as of yesterday.

2) The progress is as on yesterday.

Strictly speaking none.

The espression is as of but is is not used the way you wrote it.

1) As of yesterday, the progress is [what?].

or

I was pertaining to a certain 'cumulative progress of work'; let me put it this way:

20 km excavation is the progress as on/as of yesterday.

I hope this is clearer.

Cheers.

You mean something like:

20 km excavation has been progressed, as of yesterday

This means: We started yesterday and by today we've finished 20 km.

You cannot link as of yesterday with anything:

As of yesterday, 20 km excavation has been progressed.

20 km excavation, as of yesterday, has been progressed.

what is the difference between as of and as on. both same meaning?????///

In the United States, we use the phrase "as of" to express the status of something on a certain date or time.

Examples:

Please provide the child's grade level as of March 1, 2018.

As of two weeks ago, I am a non-smoker.

The progress is as on yesterday.